diff --git a/src/core/meta-workspace-manager-private.h b/src/core/meta-workspace-manager-private.h
index 4b5d4f4e3..d123761ed 100644
--- a/src/core/meta-workspace-manager-private.h
+++ b/src/core/meta-workspace-manager-private.h
@@ -53,9 +53,6 @@ struct _MetaWorkspaceContext
   // The rule above about not writing if context is currently active also applies to this field.
   MetaWorkspace *active_workspace;
 
-  // PID namespace
-  gchar *namespace;
-
   // A unique ID value for this context.
   guint id;
 };
@@ -73,8 +70,6 @@ struct _MetaWorkspaceManager
   // List of WorkspaceContext
   GList *context_list;
 
-  gchar *mutter_namespace;
-
   // Current active WorkspaceContext. MetaWorkspaceManager state (workspaces, active_workspace)
   // will be saved here when a new WorkspaceContext is made active.
   MetaWorkspaceContext *active_context;
@@ -136,8 +131,6 @@ void meta_workspace_manager_update_num_workspaces (MetaWorkspaceManager *workspa
                                                    guint32               timestamp,
                                                    int                   new_num);
 
-MetaWorkspaceContext *meta_workspace_context_new (MetaWorkspaceManager *manager, const char *namespace);
-
 void meta_workspace_context_make_active (MetaWorkspaceContext *context);
 
 MetaWorkspaceContext *meta_workspace_manager_lookup_context (MetaWorkspaceManager *workspace_manager,
@@ -158,8 +151,4 @@ int meta_workspace_manager_get_workspace_id (MetaWorkspaceManager *workspace_man
 MetaWorkspace *
 meta_workspace_manager_lookup_workspace_by_id (MetaWorkspaceManager *workspace_manager, int workspace_id);
 
-gboolean
-meta_workspace_manager_is_window_on_foreign_context (MetaWorkspaceManager *workspace_manager, MetaWindow *window);
-
-
 #endif /* META_WORKSPACE_MANAGER_PRIVATE_H */
diff --git a/src/core/meta-workspace-manager.c b/src/core/meta-workspace-manager.c
index 393ddf668..fd0e7b775 100644
--- a/src/core/meta-workspace-manager.c
+++ b/src/core/meta-workspace-manager.c
@@ -267,9 +267,8 @@ meta_workspace_manager_new (MetaDisplay *display)
   workspace_manager->context_list = NULL;
   workspace_manager->active_context = NULL;
   workspace_manager->next_context_id = 1;
-  workspace_manager->mutter_namespace = meta_read_pid_namespace (getpid());
 
-  MetaWorkspaceContext *context = meta_workspace_context_new (workspace_manager, NULL);
+  MetaWorkspaceContext *context = meta_workspace_context_new (workspace_manager);
 
   workspace_manager->workspaces = g_steal_pointer (&context->workspaces);
   workspace_manager->active_workspace = g_steal_pointer (&context->active_workspace);
@@ -1170,20 +1169,11 @@ meta_workspace_manager_lookup_context (MetaWorkspaceManager *workspace_manager,
   return NULL;
 }
 
-const char *
-meta_workspace_manager_mutter_namespace (MetaWorkspaceManager *workspace_manager)
-{
-  if (!workspace_manager->mutter_namespace) {
-    workspace_manager->mutter_namespace = meta_read_pid_namespace (getpid());
-  }
-  return workspace_manager->mutter_namespace;
-}
-
 /*
  * Return pointer to the live workspace list depending on whether or not the context is currently active.
  * While a workspace context is active, the list must be accessed through the pointer workspace_manager->workspaces
  */
-GList **
+static GList **
 meta_workspace_manager_workspace_list_for_context (MetaWorkspaceManager *workspace_manager, guint context_id)
 {
   if (workspace_manager->active_context && workspace_manager->active_context->id == context_id) {
@@ -1276,36 +1266,10 @@ meta_workspace_manager_lookup_workspace_by_id (MetaWorkspaceManager *workspace_m
   return NULL;
 }
 
-/**
- * meta_workspace_manager_context_for_namespace:
- * @workspace_manager: a #MetaWorkspaceManager
- * @namespace: namespace of context
- *
- * Find an existing WorkspaceContext for the specified namespace. If no WorkspaceContext
- * currently exists for namespace create a new one.
- *
- * Return value: (transfer none): the workspace context for the specified namespace
- */
 MetaWorkspaceContext *
-meta_workspace_manager_context_for_namespace (MetaWorkspaceManager *workspace_manager, const gchar *namespace)
+meta_workspace_manager_active_context (MetaWorkspaceManager * workspace_manager)
 {
-  MetaWorkspaceContext *anonymous_context = NULL;
-
-  for (GList *iter = workspace_manager->context_list; iter; iter = iter->next) {
-    MetaWorkspaceContext *context = iter->data;
-    if (context->namespace == NULL && anonymous_context == NULL) {
-      anonymous_context = context;
-    } else if (!g_strcmp0 (context->namespace, namespace )) {
-      return context;
-    }
-  }
-
-  if (anonymous_context) {
-    anonymous_context->namespace = g_strdup (namespace);
-    return anonymous_context;
-  }
-
-  return meta_workspace_context_new (workspace_manager, namespace);
+  return workspace_manager->active_context;
 }
 
 guint
@@ -1344,7 +1308,6 @@ meta_workspace_context_remove (MetaWorkspaceContext *context)
   g_signal_emit (context->manager, workspace_manager_signals[CONTEXT_REMOVED],
                  0, context->id);
 
-  g_clear_pointer (&context->namespace, g_free);
   context->manager->context_list = g_list_remove (context->manager->context_list, context);
   g_object_unref (context);
 }
@@ -1360,7 +1323,7 @@ meta_workspace_context_init (MetaWorkspaceContext *context)
 }
 
 MetaWorkspaceContext *
-meta_workspace_context_new (MetaWorkspaceManager *manager, const char *namespace)
+meta_workspace_context_new (MetaWorkspaceManager *manager)
 {
   guint context_id = manager->next_context_id++;
 
@@ -1369,13 +1332,8 @@ meta_workspace_context_new (MetaWorkspaceManager *manager, const char *namespace
   context->manager = manager;
   context->workspaces = NULL;
   context->active_workspace = NULL;
-  context->namespace = NULL;
   context->id = context_id;
 
-  if (namespace) {
-    context->namespace = g_strdup (namespace);
-  }
-
   manager->context_list = g_list_append (manager->context_list, context);
 
   context->active_workspace = meta_workspace_new_with_context_id (manager, context_id);
@@ -1483,16 +1441,3 @@ meta_workspace_context_activate (MetaWorkspaceContext *context)
   /* Will set manager->active_workspace from context->active_workspace */
   meta_workspace_activate ( g_steal_pointer (&context->active_workspace), timestamp);
 }
-
-gboolean
-meta_workspace_manager_is_window_on_foreign_context (MetaWorkspaceManager *workspace_manager, MetaWindow *window)
-{
-  const char *ns = meta_window_namespace (window);
-
-  if (!ns || !g_strcmp0 (ns, workspace_manager->mutter_namespace) || !window->workspace) {
-    return FALSE;
-  }
-
-  MetaWorkspaceContext *context = meta_workspace_manager_context_for_namespace (workspace_manager, ns);
-  return context->id != window->workspace->context_id;
-}
diff --git a/src/core/util-private.h b/src/core/util-private.h
index b7189c0e4..fa9f2be4b 100644
--- a/src/core/util-private.h
+++ b/src/core/util-private.h
@@ -51,6 +51,4 @@ void meta_init_debug_utils (void);
    (ycoord) >= (rect).y &&                   \
    (ycoord) <  ((rect).y + (rect).height))
 
-char *   meta_read_pid_namespace (pid_t pid);
-
 #endif
diff --git a/src/core/util.c b/src/core/util.c
index 444afb115..5f981cbcb 100644
--- a/src/core/util.c
+++ b/src/core/util.c
@@ -583,52 +583,4 @@ MetaDebugPaintFlag
 meta_get_debug_paint_flags (void)
 {
   return debug_paint_flags;
-}
-
-static GFileInfo *
-pid_namespace_file_info (pid_t pid)
-{
-  char *filename = g_strdup_printf("/proc/%u/ns/pid", pid);
-  GFile *file = g_file_new_for_path(filename);
-  g_free(filename);
-
-  GError *error = NULL;
-
-  GFileInfo *info = g_file_query_info(file,
-                                      G_FILE_ATTRIBUTE_STANDARD_IS_SYMLINK "," G_FILE_ATTRIBUTE_STANDARD_SYMLINK_TARGET,
-                                      G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
-                                      NULL,
-                                      &error);
-
-  g_object_unref(file);
-
-  if (info == NULL) {
-    g_warning("MetaWindow: Error attempting to read /proc/%u/ns/pid symlink:  %s", pid, error->message);
-    g_error_free (error);
-    return NULL;
-  }
-
-  if (!g_file_info_get_is_symlink (info)) {
-    g_warning("MetaWindow: /proc/%u/ns/pid exists but is not a symlink?", pid);
-    g_object_unref (info);
-    return NULL;
-  }
-
-  return info;
-
-}
-
-char *
-meta_read_pid_namespace (pid_t pid)
-{
-  char *value = NULL;
-  GFileInfo *info = pid_namespace_file_info (pid);
-  const char *target = g_file_info_get_symlink_target (info);
-
-  if (target) {
-    value = g_strdup (target);
-  }
-  g_object_unref (info);
-
-  return value;
-}
+}
\ No newline at end of file
diff --git a/src/core/window-private.h b/src/core/window-private.h
index 678055b71..4f269ff37 100644
--- a/src/core/window-private.h
+++ b/src/core/window-private.h
@@ -561,9 +561,6 @@ struct _MetaWindow
   gboolean has_valid_cgroup;
   GFile *cgroup_path;
 
-  guint namespace_set: 1;
-  gchar *namespace;
-
   unsigned int events_during_ping;
 };
 
diff --git a/src/core/window.c b/src/core/window.c
index 6044c18f9..569c4cae1 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -327,7 +327,6 @@ meta_window_finalize (GObject *object)
   g_free (window->gtk_app_menu_object_path);
   g_free (window->gtk_menubar_object_path);
   g_free (window->placement.rule);
-  g_free (window->namespace);
 
   G_OBJECT_CLASS (meta_window_parent_class)->finalize (object);
 }
@@ -8636,32 +8635,4 @@ meta_window_calculate_bounds (MetaWindow *window,
     {
       return FALSE;
     }
-}
-
-/**
- * meta_window_namespace:
- * @window: a #MetaWindow
- *
- * Returns string identifying PID namespace this window belongs to
- * if known
- *
- * Return value: (transfer none): the pid namespace string, or %NULL
- */
-const char *
-meta_window_namespace (MetaWindow *window)
-{
-  if (!window->namespace_set) {
-    window->namespace_set = TRUE;
-    pid_t pid = meta_window_get_pid (window);
-    if (pid) {
-      window->namespace = meta_read_pid_namespace (pid);
-    }
-  }
-  return window->namespace;
-}
-
-gboolean
-meta_window_is_on_foreign_workspace_context (MetaWindow *window)
-{
-  return meta_workspace_manager_is_window_on_foreign_context (window->display->workspace_manager, window);
-}
+}
\ No newline at end of file
diff --git a/src/meta/meta-workspace-manager.h b/src/meta/meta-workspace-manager.h
index d00948da7..a3d4bc1d0 100644
--- a/src/meta/meta-workspace-manager.h
+++ b/src/meta/meta-workspace-manager.h
@@ -86,6 +86,11 @@ void meta_workspace_manager_override_workspace_layout (MetaWorkspaceManager *wor
                                                        gboolean              vertical_layout,
                                                        int                   n_rows,
                                                        int                   n_columns);
+
+META_EXPORT
+MetaWorkspaceContext *
+meta_workspace_manager_active_context (MetaWorkspaceManager *workspace_manager);
+
 META_EXPORT
 guint meta_workspace_manager_active_context_id (MetaWorkspaceManager *workspace_manager);
 
@@ -94,11 +99,8 @@ void meta_workspace_manager_set_builtin_struts_all(MetaWorkspaceManager *workspa
                                                    GSList               *struts);
 
 META_EXPORT
-MetaWorkspaceContext *meta_workspace_manager_context_for_namespace (MetaWorkspaceManager *workspace_manager,
-                                                                    const gchar *namespace);
-
-META_EXPORT
-const char *meta_workspace_manager_mutter_namespace (MetaWorkspaceManager *workspace_manager);
+MetaWorkspaceContext *
+meta_workspace_context_new (MetaWorkspaceManager *manager);
 
 META_EXPORT
 void meta_workspace_context_activate (MetaWorkspaceContext *context);
diff --git a/src/meta/window.h b/src/meta/window.h
index 87dd1655e..d5d07a061 100644
--- a/src/meta/window.h
+++ b/src/meta/window.h
@@ -453,10 +453,4 @@ uint64_t meta_window_get_id (MetaWindow *window);
 META_EXPORT
 MetaWindowClientType meta_window_get_client_type (MetaWindow *window);
 
-META_EXPORT
-const char *meta_window_namespace (MetaWindow *window);
-
-META_EXPORT
-gboolean meta_window_is_on_foreign_workspace_context (MetaWindow *window);
-
 #endif