Drop gdk_screen_get_default

This function is not used anymore.

docs/reference/gdk/gdk4-sections.txt

@@ -95,7 +95,6 @@ GdkDisplay
 gdk_display_open
 gdk_display_get_default
 gdk_display_get_name
-gdk_display_get_default_screen
 gdk_display_get_device_manager
 gdk_display_device_is_grabbed
 gdk_display_beep
@@ -171,7 +170,6 @@ gdk_display_manager_get_type
 <FILE>gdkscreen</FILE>
 <TITLE>GdkScreen</TITLE>
 GdkScreen
-gdk_screen_get_default
 gdk_screen_get_display
 
 <SUBSECTION Standard>

gdk/gdkdisplaymanager.c

@@ -348,30 +348,6 @@ gdk_display_get_default (void)
   return gdk_display_manager_get_default_display (gdk_display_manager_get ());
 }
 
-/**
- * gdk_screen_get_default:
- *
- * Gets the default screen for the default display. (See
- * gdk_display_get_default ()).
- *
- * Returns: (nullable) (transfer none): a #GdkScreen, or %NULL if
- *     there is no default display.
- *
- * Since: 2.2
- */
-GdkScreen *
-gdk_screen_get_default (void)
-{
-  GdkDisplay *display;
-
-  display = gdk_display_get_default ();
-
-  if (display)
-    return GDK_DISPLAY_GET_CLASS (display)->get_default_screen (display);
-  else
-    return NULL;
-}
-
 /**
  * gdk_display_manager_set_default_display:
  * @manager: a #GdkDisplayManager

gdk/gdkscreen.h

@@ -44,9 +44,6 @@ GType        gdk_screen_get_type              (void) G_GNUC_CONST;
 GDK_AVAILABLE_IN_ALL
 GdkDisplay * gdk_screen_get_display           (GdkScreen   *screen);
 
-GDK_AVAILABLE_IN_ALL
-GdkScreen *gdk_screen_get_default (void);
-
 G_END_DECLS
 
 #endif  /* __GDK_SCREEN_H__ */