[formatsort] Remove unnecessary field_preference from extractors

These were written with the old format sorting in mind and is no longer needed

youtube_dlc/extractor/umg.py

@@ -91,7 +91,7 @@ class UMGDeIE(InfoExtractor):
         if not formats:
             for format_id in (867, 836, 940):
                 add_m3u8_format(format_id)
-        self._sort_formats(formats, ('width', 'height', 'filesize', 'tbr'))
+        self._sort_formats(formats)
 
         return {
             'id': video_id,