[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/alura.py

@@ -67,7 +67,7 @@ class AluraIE(InfoExtractor):
                             f['height'] = int('720' if m.group('res') == 'hd' else '480')
                 formats.extend(video_format)
 
-            self._sort_formats(formats, field_preference=('height', 'width', 'tbr', 'format_id'))
+            self._sort_formats(formats)
 
             return {
                 'id': video_id,