cogl: Remove unused Error types

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3910>

cogl/cogl/cogl-bitmap.c

@@ -372,12 +372,6 @@ cogl_bitmap_get_buffer (CoglBitmap *bitmap)
   return COGL_PIXEL_BUFFER (bitmap->buffer);
 }
 
-uint32_t
-cogl_bitmap_error_quark (void)
-{
-  return g_quark_from_static_string ("cogl-bitmap-error-quark");
-}
-
 uint8_t *
 _cogl_bitmap_map (CoglBitmap *bitmap,
                   CoglBufferAccess access,

cogl/cogl/cogl-bitmap.h

@@ -197,31 +197,4 @@ cogl_bitmap_get_rowstride (CoglBitmap *bitmap);
 COGL_EXPORT CoglPixelBuffer *
 cogl_bitmap_get_buffer (CoglBitmap *bitmap);
 
-/**
- * COGL_BITMAP_ERROR:
- *
- * #GError domain for bitmap errors.
- */
-#define COGL_BITMAP_ERROR (cogl_bitmap_error_quark ())
-
-/**
- * CoglBitmapError:
- * @COGL_BITMAP_ERROR_FAILED: Generic failure code, something went
- *   wrong.
- * @COGL_BITMAP_ERROR_UNKNOWN_TYPE: Unknown image type.
- * @COGL_BITMAP_ERROR_CORRUPT_IMAGE: An image file was broken somehow.
- *
- * Error codes that can be thrown when performing bitmap
- * operations.
- */
-typedef enum
-{
-  COGL_BITMAP_ERROR_FAILED,
-  COGL_BITMAP_ERROR_UNKNOWN_TYPE,
-  COGL_BITMAP_ERROR_CORRUPT_IMAGE
-} CoglBitmapError;
-
-COGL_EXPORT
-uint32_t cogl_bitmap_error_quark (void);
-
 G_END_DECLS

cogl/cogl/cogl-buffer.h

@@ -79,24 +79,6 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC (CoglBuffer, g_object_unref)
 COGL_EXPORT
 GType       cogl_buffer_get_type (void) G_GNUC_CONST;
 
-#define COGL_BUFFER_ERROR (_cogl_buffer_error_domain ())
-
-/**
- * CoglBufferError:
- * @COGL_BUFFER_ERROR_MAP: A buffer could not be mapped either
- *    because the feature isn't supported or because a system
- *    limitation was hit.
- *
- * Error enumeration for #CoglBuffer
- */
-typedef enum /*< prefix=COGL_BUFFER_ERROR >*/
-{
-  COGL_BUFFER_ERROR_MAP
-} CoglBufferError;
-
-uint32_t
-_cogl_buffer_error_domain (void);
-
 /**
  * cogl_buffer_get_size:
  * @buffer: a buffer object