plugin-manager: Drop MetaPluginClass.xevent_filter

This was added for registering profiling hooks for glx.swapComplete on
x11 code paths.

Nowadays we have sysprof

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3599>

src/backends/x11/meta-backend-x11.c

@@ -348,9 +348,7 @@ handle_host_xevent (MetaBackend *backend,
   MetaBackendX11Private *priv = meta_backend_x11_get_instance_private (x11);
   ClutterBackend *clutter_backend = meta_backend_get_clutter_backend (backend);
   ClutterSeat *seat = clutter_backend_get_default_seat (clutter_backend);
-  MetaContext *context = meta_backend_get_context (backend);
   gboolean bypass_clutter = FALSE;
-  MetaDisplay *display;
 
   switch (event->type)
     {
@@ -365,19 +363,7 @@ handle_host_xevent (MetaBackend *backend,
 
   XGetEventData (priv->xdisplay, &event->xcookie);
 
-  display = meta_context_get_display (context);
-  if (display)
-    {
-      MetaCompositor *compositor = display->compositor;
-      MetaPluginManager *plugin_mgr =
-        meta_compositor_get_plugin_manager (compositor);
-
-      if (meta_plugin_manager_xevent_filter (plugin_mgr, event))
-        bypass_clutter = TRUE;
-    }
-
-  bypass_clutter = (meta_backend_x11_handle_host_xevent (x11, event) ||
-                    bypass_clutter);
+  bypass_clutter = meta_backend_x11_handle_host_xevent (x11, event);
 
   if (event->type == (priv->xsync_event_base + XSyncAlarmNotify))
     handle_alarm_notify (backend, (XSyncAlarmNotifyEvent *) event);

src/compositor/meta-plugin-manager.c

@@ -26,7 +26,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "backends/x11/meta-clutter-backend-x11.h"
 #include "compositor/compositor-private.h"
 #include "compositor/meta-module.h"
 #include "core/meta-inhibit-shortcuts-dialog-default-private.h"
@@ -332,15 +331,6 @@ meta_plugin_manager_filter_keybinding (MetaPluginManager *plugin_mgr,
   return FALSE;
 }
 
-gboolean
-meta_plugin_manager_xevent_filter (MetaPluginManager *plugin_mgr,
-                                   XEvent            *xev)
-{
-  MetaPlugin *plugin = plugin_mgr->plugin;
-
-  return _meta_plugin_xevent_filter (plugin, xev);
-}
-
 void
 meta_plugin_manager_confirm_display_change (MetaPluginManager *plugin_mgr)
 {

src/compositor/meta-plugin-manager.h

@@ -70,11 +70,6 @@ gboolean meta_plugin_manager_switch_workspace (MetaPluginManager   *mgr,
 gboolean meta_plugin_manager_filter_keybinding (MetaPluginManager  *mgr,
                                                 MetaKeyBinding     *binding);
 
-gboolean meta_plugin_manager_xevent_filter (MetaPluginManager *mgr,
-                                            XEvent            *xev);
-gboolean _meta_plugin_xevent_filter (MetaPlugin *plugin,
-                                     XEvent     *xev);
-
 void     meta_plugin_manager_confirm_display_change (MetaPluginManager *mgr);
 
 gboolean meta_plugin_manager_show_tile_preview (MetaPluginManager *mgr,

src/compositor/meta-plugin.c

@@ -30,12 +30,8 @@
 #include "meta/meta-plugin.h"
 
 #include <string.h>
-#include <X11/Xlib.h>
-#include <X11/extensions/Xfixes.h>
-#include <X11/extensions/shape.h>
 
 #include "backends/meta-monitor-manager-private.h"
-#include "backends/x11/meta-clutter-backend-x11.h"
 #include "compositor/compositor-private.h"
 #include "compositor/meta-window-actor-private.h"
 #include "compositor/meta-plugin-manager.h"
@@ -71,18 +67,6 @@ meta_plugin_get_info (MetaPlugin *plugin)
   return NULL;
 }
 
-gboolean
-_meta_plugin_xevent_filter (MetaPlugin *plugin,
-                            XEvent     *xev)
-{
-  MetaPluginClass *klass = META_PLUGIN_GET_CLASS (plugin);
-
-  if (klass->xevent_filter)
-    return klass->xevent_filter (plugin, xev);
-  else
-    return FALSE;
-}
-
 void
 meta_plugin_switch_workspace_completed (MetaPlugin *plugin)
 {

src/meta/meta-plugin.h

@@ -21,7 +21,6 @@
 
 #pragma once
 
-#include <X11/extensions/Xfixes.h>
 #include <gmodule.h>
 
 #include "clutter/clutter.h"
@@ -52,7 +51,6 @@ typedef struct _MetaPluginInfo    MetaPluginInfo;
  * as if the effect terminated naturally
  * @kill_switch_workspace: virtual function called when the workspace-switching
  * effect needs to be killed prematurely
- * @xevent_filter: virtual function called when handling each event
  * @keybinding_filter: virtual function called when handling each keybinding
  * @plugin_info: virtual function that returns information about the
  * #MetaPlugin
@@ -165,20 +163,6 @@ struct _MetaPluginClass
    */
   void (*kill_switch_workspace)    (MetaPlugin     *plugin);
 
-  /**
-   * MetaPluginClass::xevent_filter:
-   * @event: (type xlib.XEvent):
-   *
-   * Virtual function called when handling each event.
-   *
-   * Returns: %TRUE if the plugin handled the event type (i.e., if the return
-   * value is %FALSE, there will be no subsequent call to the manager
-   * completed() callback, and the compositor must ensure that any appropriate
-   * post-effect cleanup is carried out.
-   */
-  gboolean (*xevent_filter) (MetaPlugin       *plugin,
-                             XEvent           *event);
-
   /**
    * MetaPluginClass::keybinding_filter:
    * @binding: a #MetaKeyBinding