[mutter] clutter: Remove unneeded X11 includes from various headers

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit a46fd334601a20c58a0680caeb06c95d38e43249
Author: Adam Jackson <ajax redhat com>
Date:   Tue Dec 17 10:56:50 2019 -0500

    clutter: Remove unneeded X11 includes from various headers
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/977

 clutter/clutter/cogl/clutter-stage-cogl.h | 6 ------
 clutter/clutter/egl/clutter-egl.h         | 6 ------
 2 files changed, 12 deletions(-)
---
diff --git a/clutter/clutter/cogl/clutter-stage-cogl.h b/clutter/clutter/cogl/clutter-stage-cogl.h
index 084788790..3ad658bc5 100644
--- a/clutter/clutter/cogl/clutter-stage-cogl.h
+++ b/clutter/clutter/cogl/clutter-stage-cogl.h
@@ -5,12 +5,6 @@
 #include <clutter/clutter-backend.h>
 #include <clutter/clutter-stage.h>
 
-#ifdef COGL_HAS_X11_SUPPORT
-#include <X11/Xlib.h>
-#include <X11/Xatom.h>
-#include <X11/Xutil.h>
-#endif
-
 #include "clutter/clutter-stage-window.h"
 
 G_BEGIN_DECLS
diff --git a/clutter/clutter/egl/clutter-egl.h b/clutter/clutter/egl/clutter-egl.h
index dfa545804..8258cbec4 100644
--- a/clutter/clutter/egl/clutter-egl.h
+++ b/clutter/clutter/egl/clutter-egl.h
@@ -37,12 +37,6 @@
 
 #include <glib.h>
 
-#ifdef COGL_HAS_XLIB_SUPPORT
-#include <X11/Xlib.h>
-#include <X11/Xatom.h>
-#include <X11/Xutil.h>
-#endif
-
 #include "clutter-egl-headers.h"
 #include <clutter/clutter.h>