Revert "prefs: Scale the root window cursor by the scale factor"

This reverts commit 4fe66ce0a9.

This is wrong ... we should not scale the cursor size but read
the cursor xsettings that gets exported by gsd. Also this won't update on
resolution changes.

https://bugzilla.gnome.org/show_bug.cgi?id=729337

src/core/prefs.c

@@ -1347,26 +1347,10 @@ meta_prefs_get_cursor_theme (void)
   return cursor_theme;
 }
 
-static int
-get_scale_factor (void)
-{
-  GdkScreen *screen;
-  GValue value = G_VALUE_INIT;
-
-  g_value_init (&value, G_TYPE_INT);
-
-  /* XXX: Should this be in ui/ ? Or MetaMonitorManager? */
-  screen = gdk_screen_get_default ();
-  if (gdk_screen_get_setting (screen, "gdk-window-scaling-factor", &value))
-    return g_value_get_int (&value);
-  else
-    return 1;
-}
-
 int
 meta_prefs_get_cursor_size (void)
 {
-  return cursor_size * get_scale_factor ();
+  return cursor_size;
 }