[mutter] cogl: Remove redundant function declarations

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

commit 548c0f16f4fc2c064b06532401002d1a19eedd47
Author: Jonas Ådahl <jadahl gmail com>
Date:   Sun Jan 20 11:39:49 2019 +0100

    cogl: Remove redundant function declarations

 cogl/cogl/cogl-pipeline-layer-private.h    | 3 ---
 cogl/cogl/cogl-pipeline-private.h          | 7 -------
 cogl/cogl/deprecated/cogl-shader-private.h | 3 ---
 3 files changed, 13 deletions(-)
---
diff --git a/cogl/cogl/cogl-pipeline-layer-private.h b/cogl/cogl/cogl-pipeline-layer-private.h
index 38cd3b5eb..22bea830e 100644
--- a/cogl/cogl/cogl-pipeline-layer-private.h
+++ b/cogl/cogl/cogl-pipeline-layer-private.h
@@ -377,9 +377,6 @@ CoglPipelineLayer *
 _cogl_pipeline_layer_get_authority (CoglPipelineLayer *layer,
                                     unsigned long difference);
 
-CoglTexture *
-_cogl_pipeline_layer_get_texture (CoglPipelineLayer *layer);
-
 int
 _cogl_pipeline_layer_get_unit_index (CoglPipelineLayer *layer);
 
diff --git a/cogl/cogl/cogl-pipeline-private.h b/cogl/cogl/cogl-pipeline-private.h
index e0de0824b..ae6494cf3 100644
--- a/cogl/cogl/cogl-pipeline-private.h
+++ b/cogl/cogl/cogl-pipeline-private.h
@@ -805,9 +805,6 @@ _cogl_pipeline_weak_copy (CoglPipeline *pipeline,
 void
 _cogl_pipeline_set_progend (CoglPipeline *pipeline, int progend);
 
-CoglPipeline *
-_cogl_pipeline_get_parent (CoglPipeline *pipeline);
-
 void
 _cogl_pipeline_get_colorubv (CoglPipeline *pipeline,
                              uint8_t       *color);
@@ -883,10 +880,6 @@ _cogl_pipeline_set_static_breadcrumb (CoglPipeline *pipeline,
 unsigned long
 _cogl_pipeline_get_age (CoglPipeline *pipeline);
 
-CoglPipeline *
-_cogl_pipeline_get_authority (CoglPipeline *pipeline,
-                              unsigned long difference);
-
 void
 _cogl_pipeline_add_layer_difference (CoglPipeline *pipeline,
                                      CoglPipelineLayer *layer,
diff --git a/cogl/cogl/deprecated/cogl-shader-private.h b/cogl/cogl/deprecated/cogl-shader-private.h
index 5651c0ac8..76eed7225 100644
--- a/cogl/cogl/deprecated/cogl-shader-private.h
+++ b/cogl/cogl/deprecated/cogl-shader-private.h
@@ -57,9 +57,6 @@ void
 _cogl_shader_compile_real (CoglHandle handle,
                            CoglPipeline *pipeline);
 
-CoglShaderLanguage
-_cogl_program_get_language (CoglHandle handle);
-
 void
 _cogl_shader_set_source_with_boilerplate (GLuint shader_gl_handle,
                                           GLenum shader_gl_type,