[mutter] cogl: Remove unused COGL_FEATURE_DEPTH_TEXTURE

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

commit 45e77c1d87197778e87e6e29862c0e5be1ae8cf7
Author: Adam Jackson <ajax redhat com>
Date:   Thu Oct 17 19:34:15 2019 -0400

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

 cogl/cogl/cogl-types.h                      | 3 ---
 cogl/cogl/driver/gl/gl/cogl-driver-gl.c     | 1 -
 cogl/cogl/driver/gl/gles/cogl-driver-gles.c | 1 -
 3 files changed, 5 deletions(-)
---
diff --git a/cogl/cogl/cogl-types.h b/cogl/cogl/cogl-types.h
index c337f1e2b..4da55dad0 100644
--- a/cogl/cogl/cogl-types.h
+++ b/cogl/cogl/cogl-types.h
@@ -125,8 +125,6 @@ typedef struct _CoglTextureVertex       CoglTextureVertex;
  *     supported with CoglBufferAccess including read support.
  * @COGL_FEATURE_MAP_BUFFER_FOR_WRITE: Whether cogl_buffer_map() is
  *     supported with CoglBufferAccess including write support.
- * @COGL_FEATURE_DEPTH_TEXTURE: Whether #CoglFramebuffer support rendering the
- *     depth buffer to a texture.
  *
  * Flags for the supported features.
  *
@@ -144,7 +142,6 @@ typedef enum
   COGL_FEATURE_MAP_BUFFER_FOR_READ    = (1 << 21),
   COGL_FEATURE_MAP_BUFFER_FOR_WRITE   = (1 << 22),
   COGL_FEATURE_ONSCREEN_MULTIPLE      = (1 << 23),
-  COGL_FEATURE_DEPTH_TEXTURE          = (1 << 24)
 } CoglFeatureFlags;
 
 /**
diff --git a/cogl/cogl/driver/gl/gl/cogl-driver-gl.c b/cogl/cogl/driver/gl/gl/cogl-driver-gl.c
index 80efe7ffa..327cf6fad 100644
--- a/cogl/cogl/driver/gl/gl/cogl-driver-gl.c
+++ b/cogl/cogl/driver/gl/gl/cogl-driver-gl.c
@@ -433,7 +433,6 @@ _cogl_driver_update_features (CoglContext *ctx,
   if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 3, 0) ||
       _cogl_check_extension ("GL_ARB_depth_texture", gl_extensions))
     {
-      flags |= COGL_FEATURE_DEPTH_TEXTURE;
       COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_DEPTH_TEXTURE, TRUE);
     }
 
diff --git a/cogl/cogl/driver/gl/gles/cogl-driver-gles.c b/cogl/cogl/driver/gl/gles/cogl-driver-gles.c
index 600a13a6e..12419a0fe 100644
--- a/cogl/cogl/driver/gl/gles/cogl-driver-gles.c
+++ b/cogl/cogl/driver/gl/gles/cogl-driver-gles.c
@@ -320,7 +320,6 @@ _cogl_driver_update_features (CoglContext *context,
 
   if (_cogl_check_extension ("GL_OES_depth_texture", gl_extensions))
     {
-      flags |= COGL_FEATURE_DEPTH_TEXTURE;
       COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_DEPTH_TEXTURE, TRUE);
     }