[mutter] cogl: Remove unused CoglMatrixMode

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

commit 737763112e2d9eec446815bac434172e3dba880b
Author: Adam Jackson <ajax redhat com>
Date:   Wed Dec 18 16:54:27 2019 -0500

    cogl: Remove unused CoglMatrixMode
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/995

 cogl/cogl/cogl-context-private.h      | 4 ----
 cogl/cogl/cogl-context.c              | 2 --
 cogl/cogl/cogl-matrix-stack-private.h | 7 -------
 3 files changed, 13 deletions(-)
---
diff --git a/cogl/cogl/cogl-context-private.h b/cogl/cogl/cogl-context-private.h
index 3cd639aae..a6efc4e3a 100644
--- a/cogl/cogl/cogl-context-private.h
+++ b/cogl/cogl/cogl-context-private.h
@@ -122,10 +122,6 @@ struct _CoglContext
   CoglMatrix        identity_matrix;
   CoglMatrix        y_flip_matrix;
 
-  /* Value that was last used when calling glMatrixMode to avoid
-     calling it multiple times */
-  CoglMatrixMode    flushed_matrix_mode;
-
   /* The matrix stack entries that should be flushed during the next
    * pipeline state flush */
   CoglMatrixEntry *current_projection_entry;
diff --git a/cogl/cogl/cogl-context.c b/cogl/cogl/cogl-context.c
index cb28321f6..aace02005 100644
--- a/cogl/cogl/cogl-context.c
+++ b/cogl/cogl/cogl-context.c
@@ -252,8 +252,6 @@ cogl_context_new (CoglDisplay *display,
   cogl_matrix_init_identity (&context->y_flip_matrix);
   cogl_matrix_scale (&context->y_flip_matrix, 1, -1, 1);
 
-  context->flushed_matrix_mode = COGL_MATRIX_MODELVIEW;
-
   context->opaque_color_pipeline = cogl_pipeline_new (context);
 
   context->codegen_header_buffer = g_string_new ("");
diff --git a/cogl/cogl/cogl-matrix-stack-private.h b/cogl/cogl/cogl-matrix-stack-private.h
index 264394ebe..7a6e8b587 100644
--- a/cogl/cogl/cogl-matrix-stack-private.h
+++ b/cogl/cogl/cogl-matrix-stack-private.h
@@ -154,13 +154,6 @@ typedef struct _CoglMatrixEntryCache
 void
 _cogl_matrix_entry_identity_init (CoglMatrixEntry *entry);
 
-typedef enum
-{
-  COGL_MATRIX_MODELVIEW,
-  COGL_MATRIX_PROJECTION,
-  COGL_MATRIX_TEXTURE
-} CoglMatrixMode;
-
 void
 _cogl_matrix_entry_cache_init (CoglMatrixEntryCache *cache);