cogl/pipeline: Remove cogl_pipeline_get_layer_min/mag_filter

Unused since https://gitlab.gnome.org/GNOME/mutter/merge_requests/932
AFAICT.

As a bonus, gets rid of these compiler warnings:

../cogl/cogl/cogl-pipeline-layer-state.c: In function ‘cogl_pipeline_get_layer_min_filter’:
../cogl/cogl/cogl-pipeline-layer-state.c:1279:10: warning: ‘min_filter’ may be used uninitialized [-Wmaybe-uninitialized]
 1279 |   return min_filter;
      |          ^~~~~~~~~~
../cogl/cogl/cogl-pipeline-layer-state.c:1274:22: note: ‘min_filter’ was declared here
 1274 |   CoglPipelineFilter min_filter;
      |                      ^~~~~~~~~~
../cogl/cogl/cogl-pipeline-layer-state.c: In function ‘cogl_pipeline_get_layer_mag_filter’:
../cogl/cogl/cogl-pipeline-layer-state.c:1291:10: warning: ‘mag_filter’ may be used uninitialized [-Wmaybe-uninitialized]
 1291 |   return mag_filter;
      |          ^~~~~~~~~~
../cogl/cogl/cogl-pipeline-layer-state.c:1287:22: note: ‘mag_filter’ was declared here
 1287 |   CoglPipelineFilter mag_filter;
      |                      ^~~~~~~~~~

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2757>

2 files changed, 0 insertions, 62 deletions

diff --git a/cogl/cogl/cogl-pipeline-layer-state.c b/cogl/cogl/cogl-pipeline-layer-state.c
index b2503148d..a56b89c19 100644
--- a/cogl/cogl/cogl-pipeline-layer-state.c
+++ b/cogl/cogl/cogl-pipeline-layer-state.c
@@ -1268,30 +1268,6 @@ _cogl_pipeline_get_layer_filters (CoglPipeline *pipeline,
 }
 
 CoglPipelineFilter
-cogl_pipeline_get_layer_min_filter (CoglPipeline *pipeline,
-                                    int layer_index)
-{
-  CoglPipelineFilter min_filter;
-  CoglPipelineFilter mag_filter;
-
-  _cogl_pipeline_get_layer_filters (pipeline, layer_index,
-                                    &min_filter, &mag_filter);
-  return min_filter;
-}
-
-CoglPipelineFilter
-cogl_pipeline_get_layer_mag_filter (CoglPipeline *pipeline,
-                                    int layer_index)
-{
-  CoglPipelineFilter min_filter;
-  CoglPipelineFilter mag_filter;
-
-  _cogl_pipeline_get_layer_filters (pipeline, layer_index,
-                                    &min_filter, &mag_filter);
-  return mag_filter;
-}
-
-CoglPipelineFilter
 _cogl_pipeline_layer_get_min_filter (CoglPipelineLayer *layer)
 {
   CoglPipelineLayer *authority;
diff --git a/cogl/cogl/cogl-pipeline-layer-state.h b/cogl/cogl/cogl-pipeline-layer-state.h
index b1773a560..a8ce9b858 100644
--- a/cogl/cogl/cogl-pipeline-layer-state.h
+++ b/cogl/cogl/cogl-pipeline-layer-state.h
@@ -349,44 +349,6 @@ cogl_pipeline_set_layer_filters (CoglPipeline      *pipeline,
                                  CoglPipelineFilter mag_filter);
 
 /**
- * cogl_pipeline_get_layer_min_filter:
- * @pipeline: A #CoglPipeline object
- * @layer_index: the layer number to change.
- *
- * Retrieves the currently set minification #CoglPipelineFilter set on
- * the specified layer. The miniifcation filter determines how the
- * layer should be sampled when down-scaled.
- *
- * The default filter is %COGL_PIPELINE_FILTER_LINEAR but this can be
- * changed using cogl_pipeline_set_layer_filters().
- *
- * Return value: The minification #CoglPipelineFilter for the
- *               specified layer.
- */
-COGL_EXPORT CoglPipelineFilter
-cogl_pipeline_get_layer_min_filter (CoglPipeline *pipeline,
-                                    int layer_index);
-
-/**
- * cogl_pipeline_get_layer_mag_filter:
- * @pipeline: A #CoglPipeline object
- * @layer_index: the layer number to change.
- *
- * Retrieves the currently set magnification #CoglPipelineFilter set on
- * the specified layer. The magnification filter determines how the
- * layer should be sampled when up-scaled.
- *
- * The default filter is %COGL_PIPELINE_FILTER_LINEAR but this can be
- * changed using cogl_pipeline_set_layer_filters().
- *
- * Return value: The magnification #CoglPipelineFilter for the
- *               specified layer.
- */
-COGL_EXPORT CoglPipelineFilter
-cogl_pipeline_get_layer_mag_filter (CoglPipeline *pipeline,
-                                    int layer_index);
-
-/**
  * cogl_pipeline_set_layer_point_sprite_coords_enabled:
  * @pipeline: A #CoglPipeline object
  * @layer_index: the layer number to change.