drm/fourcc: Remove struct drm_format_buf_name

The structure is unused. Remove it.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210516121315.30321-5-tzimmermann@suse.de

include/drm/drm_fourcc.h

@@ -135,14 +135,6 @@ struct drm_format_info {
 	bool is_yuv;
 };
 
-/**
- * struct drm_format_name_buf - name of a DRM format
- * @str: string buffer containing the format name
- */
-struct drm_format_name_buf {
-	char str[32];
-};
-
 /**
  * drm_format_info_is_yuv_packed - check that the format info matches a YUV
  * format with data laid in a single plane