Remove --filesystem-encoding

yt_dlp/options.py

@@ -1380,10 +1380,6 @@ def create_parser():
         '--trim-filenames', '--trim-file-names', metavar='LENGTH',
         dest='trim_file_name', default='notrim',
         help='Limit the filename length (excluding extension) to the specified number of characters or bytes')
-    filesystem.add_option(
-        '--filesystem-encoding', metavar='ENCODING',
-        dest='filesystem_encoding',
-        help='Override filesystem encoding used when calculating filename length in bytes')
     filesystem.add_option(
         '-w', '--no-overwrites',
         action='store_false', dest='overwrites', default=None,