[mutter] cogl: Remove unused COGL_FEATURE_FOUR_CLIP_PLANES

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

commit 26a7387f409ee5f38b7961b8c2078c8f06956652
Author: Adam Jackson <ajax redhat com>
Date:   Thu Oct 17 19:59:48 2019 -0400

    cogl: Remove unused COGL_FEATURE_FOUR_CLIP_PLANES
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/866

 cogl/cogl/cogl-types.h | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/cogl/cogl/cogl-types.h b/cogl/cogl/cogl-types.h
index 31694b25c..7989c440a 100644
--- a/cogl/cogl/cogl-types.h
+++ b/cogl/cogl/cogl-types.h
@@ -115,7 +115,6 @@ typedef struct _CoglTextureVertex       CoglTextureVertex;
  * @COGL_FEATURE_TEXTURE_YUV: ycbcr conversion support
  * @COGL_FEATURE_TEXTURE_READ_PIXELS: glReadPixels() support
  * @COGL_FEATURE_OFFSCREEN_MULTISAMPLE: Multisample support on FBOs
- * @COGL_FEATURE_FOUR_CLIP_PLANES: At least 4 clip planes available
  * @COGL_FEATURE_PBOS: PBO support
  *
  * Flags for the supported features.
@@ -127,7 +126,6 @@ typedef enum
   COGL_FEATURE_TEXTURE_YUV            = (1 << 3),
   COGL_FEATURE_TEXTURE_READ_PIXELS    = (1 << 4),
   COGL_FEATURE_OFFSCREEN_MULTISAMPLE  = (1 << 7),
-  COGL_FEATURE_FOUR_CLIP_PLANES       = (1 << 9),
   COGL_FEATURE_PBOS                  = (1 << 12),
 } CoglFeatureFlags;