[mutter] cogl: Remove unused COGL_FEATURE_PBOS

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

commit 67d5ebb18756a1f6aba827ccf1023ac2880576ab
Author: Adam Jackson <ajax redhat com>
Date:   Thu Oct 17 21:19:27 2019 -0400

    cogl: Remove unused COGL_FEATURE_PBOS
    
    Almost there.  The CoglFeatureFlags type is changed to "int"
    momentarily.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/866

 cogl/cogl/cogl-types.h | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
---
diff --git a/cogl/cogl/cogl-types.h b/cogl/cogl/cogl-types.h
index f5693a27f..fda46fe01 100644
--- a/cogl/cogl/cogl-types.h
+++ b/cogl/cogl/cogl-types.h
@@ -112,16 +112,12 @@ typedef struct _CoglTextureVertex       CoglTextureVertex;
 
 /**
  * CoglFeatureFlags:
- * @COGL_FEATURE_PBOS: PBO support
  *
  * Flags for the supported features.
  *
  * Since: 0.8
  */
-typedef enum
-{
-  COGL_FEATURE_PBOS                  = (1 << 12),
-} CoglFeatureFlags;
+typedef int CoglFeatureFlags;
 
 /**
  * CoglBufferTarget: