Revert "Add mapping for synced lyrics tag"

This reverts commit 1da61b3.

Author: phw

appendices/tag_mapping.rst

@@ -550,21 +550,6 @@ Lyrics :sup:`[4]`
    "RIFF INFO", "n/a"
 
 
-Synced Lyrics
---------------
-.. csv-table::
-   :width: 100%
-   :widths: 37 100
-
-   "Internal Name", "``syncedlyrics:language:description``"
-   "ID3v2", "``SYLT:description``"
-   "Vorbis", "n/a"
-   "APEv2", "n/a"
-   "iTunes MP4", "n/a"
-   "ASF/Windows Media", "n/a"
-   "RIFF INFO", "n/a"
-
-
 `Media <https://musicbrainz.org/doc/Release_Format>`_
 ------------------------------------------------------
 .. csv-table::

tag_mapping.py

@@ -472,17 +472,6 @@
         "riff": "n/a",
     },
 
-    {
-        "tag_name": "Synced Lyrics",
-        "picard_name": "``syncedlyrics:language:description``",
-        "id3v2": "``SYLT:description``",
-        "vorbis": "n/a",
-        "apev2": "n/a",
-        "itunes": "n/a",
-        "wmp": "n/a",
-        "riff": "n/a",
-    },
-
     {
         "tag_name": "`Media <https://musicbrainz.org/doc/Release_Format>`_",
         "picard_name": "``media``",