[options] Remove output template description from --help

Same reasons as for --format

youtube_dl/options.py

@@ -628,22 +628,7 @@ def parseOpts(overrideArguments=None):
     filesystem.add_option(
         '-o', '--output',
         dest='outtmpl', metavar='TEMPLATE',
-        help=('Output filename template. Use %(title)s to get the title, '
-              '%(uploader)s for the uploader name, %(uploader_id)s for the uploader nickname if different, '
-              '%(autonumber)s to get an automatically incremented number, '
-              '%(ext)s for the filename extension, '
-              '%(format)s for the format description (like "22 - 1280x720" or "HD"), '
-              '%(format_id)s for the unique id of the format (like YouTube\'s itags: "137"), '
-              '%(upload_date)s for the upload date (YYYYMMDD), '
-              '%(extractor)s for the provider (youtube, metacafe, etc), '
-              '%(id)s for the video id, '
-              '%(playlist_title)s, %(playlist_id)s, or %(playlist)s (=title if present, ID otherwise) for the playlist the video is in, '
-              '%(playlist_index)s for the position in the playlist. '
-              '%(height)s and %(width)s for the width and height of the video format. '
-              '%(resolution)s for a textual description of the resolution of the video format. '
-              '%% for a literal percent. '
-              'Use - to output to stdout. Can also be used to download to a different directory, '
-              'for example with -o \'/my/downloads/%(uploader)s/%(title)s-%(id)s.%(ext)s\' .'))
+        help=('Output filename template, see the "OUTPUT TEMPLATE" for all the info'))
     filesystem.add_option(
         '--autonumber-size',
         dest='autonumber_size', metavar='NUMBER',