[mutter] Revert "src/core/screen.c: Set _NET_NUMBER_OF_DESKTOPS in meta_screen_new"

[Florian Müllner <fmuellner src gnome org>]

commit fd763ad857dc5630ae2788d69c6b9dea8e171097
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Sep 30 00:14:19 2017 +0200

    Revert "src/core/screen.c: Set _NET_NUMBER_OF_DESKTOPS in meta_screen_new"
    
    When dynamic workspaces are used, we pick up an existing NUMBER_OF_DESKTOP
    hint in meta_screen_init_workspaces() to properly restore workspaces
    on restart. Unconditionally setting that hint to 1 *before* reading it
    breaks that, and we end up shifting all windows to the first workspace.
    
    This reverts commit 8532b102909e09e1e0fdbd7f2701a7c40de1af5f.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=760651

 src/core/screen.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
---
diff --git a/src/core/screen.c b/src/core/screen.c
index 82ad386..c96aefd 100644
--- a/src/core/screen.c
+++ b/src/core/screen.c
@@ -72,8 +72,6 @@ static void prefs_changed_callback (MetaPreference pref,
 
 static void set_desktop_geometry_hint (MetaScreen *screen);
 static void set_desktop_viewport_hint (MetaScreen *screen);
-static void set_number_of_spaces_hint (MetaScreen *screen,
-                                       int         n_spaces);
 
 static void on_monitors_changed (MetaMonitorManager *manager,
                                  MetaScreen         *screen);
@@ -773,7 +771,6 @@ meta_screen_new (MetaDisplay *display,
    * so create that required workspace.
    */
   meta_workspace_new (screen);
-  set_number_of_spaces_hint (screen, g_list_length (screen->workspaces));
 
   screen->keys_grabbed = FALSE;
   meta_screen_grab_keys (screen);