[mutter] cogl: Remove unused COGL_FEATURE_ID_DEPTH_RANGE

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

commit 8b0289a5ba059190aa223e46a462a83220f71660
Author: Adam Jackson <ajax redhat com>
Date:   Thu Oct 17 16:53:29 2019 -0400

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

 cogl/cogl/cogl-context.h                    | 2 --
 cogl/cogl/cogl-depth-state.h                | 7 -------
 cogl/cogl/driver/gl/gl/cogl-driver-gl.c     | 1 -
 cogl/cogl/driver/gl/gles/cogl-driver-gles.c | 1 -
 4 files changed, 11 deletions(-)
---
diff --git a/cogl/cogl/cogl-context.h b/cogl/cogl/cogl-context.h
index 7d40e1b60..51cce956f 100644
--- a/cogl/cogl/cogl-context.h
+++ b/cogl/cogl/cogl-context.h
@@ -185,7 +185,6 @@ cogl_is_context (void *object);
  * @COGL_FEATURE_ID_UNSIGNED_INT_INDICES: Set if
  *     %COGL_INDICES_TYPE_UNSIGNED_INT is supported in
  *     cogl_indices_new().
- * @COGL_FEATURE_ID_DEPTH_RANGE: cogl_pipeline_set_depth_range() support
  * @COGL_FEATURE_ID_POINT_SPRITE: Whether
  *     cogl_pipeline_set_layer_point_sprite_coords_enabled() is supported.
  * @COGL_FEATURE_ID_PER_VERTEX_POINT_SIZE: Whether cogl_point_size_in
@@ -219,7 +218,6 @@ typedef enum _CoglFeatureID
   COGL_FEATURE_ID_OFFSCREEN_MULTISAMPLE,
   COGL_FEATURE_ID_ONSCREEN_MULTIPLE,
   COGL_FEATURE_ID_UNSIGNED_INT_INDICES,
-  COGL_FEATURE_ID_DEPTH_RANGE,
   COGL_FEATURE_ID_POINT_SPRITE,
   COGL_FEATURE_ID_MAP_BUFFER_FOR_READ,
   COGL_FEATURE_ID_MAP_BUFFER_FOR_WRITE,
diff --git a/cogl/cogl/cogl-depth-state.h b/cogl/cogl/cogl-depth-state.h
index 20c8c8ab0..39962011b 100644
--- a/cogl/cogl/cogl-depth-state.h
+++ b/cogl/cogl/cogl-depth-state.h
@@ -225,13 +225,6 @@ cogl_depth_state_get_test_function (CoglDepthState *state);
  * mapped too although the range must still lye within the range [0,
  * 1].
  *
- * If your driver does not support this feature (for example you are
- * using GLES 1 drivers) then if you don't use the default range
- * values you will get an error reported when calling
- * cogl_pipeline_set_depth_state (). You can check ahead of time for
- * the %COGL_FEATURE_ID_DEPTH_RANGE feature with
- * cogl_has_feature() to know if this function will succeed.
- *
  * By default normalized device coordinate depth values are mapped to
  * the full range of depth buffer values, [0, 1].
  *
diff --git a/cogl/cogl/driver/gl/gl/cogl-driver-gl.c b/cogl/cogl/driver/gl/gl/cogl-driver-gl.c
index 4cb133b2a..72a71db02 100644
--- a/cogl/cogl/driver/gl/gl/cogl-driver-gl.c
+++ b/cogl/cogl/driver/gl/gl/cogl-driver-gl.c
@@ -398,7 +398,6 @@ _cogl_driver_update_features (CoglContext *ctx,
            | COGL_FEATURE_DEPTH_RANGE);
   COGL_FLAGS_SET (ctx->features,
                   COGL_FEATURE_ID_UNSIGNED_INT_INDICES, TRUE);
-  COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_DEPTH_RANGE, TRUE);
   COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_MIRRORED_REPEAT, TRUE);
 
   _cogl_feature_check_ext_functions (ctx,
diff --git a/cogl/cogl/driver/gl/gles/cogl-driver-gles.c b/cogl/cogl/driver/gl/gles/cogl-driver-gles.c
index 35f65386f..083c678b0 100644
--- a/cogl/cogl/driver/gl/gles/cogl-driver-gles.c
+++ b/cogl/cogl/driver/gl/gles/cogl-driver-gles.c
@@ -306,7 +306,6 @@ _cogl_driver_update_features (CoglContext *context,
    * repeat modes other than CLAMP_TO_EDGE. */
   flags |= COGL_FEATURE_DEPTH_RANGE;
   COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_OFFSCREEN, TRUE);
-  COGL_FLAGS_SET (context->features, COGL_FEATURE_ID_DEPTH_RANGE, TRUE);
   COGL_FLAGS_SET (context->features,
                   COGL_FEATURE_ID_MIRRORED_REPEAT, TRUE);
   COGL_FLAGS_SET (context->features,