[extractors] Remove VLivePlaylistIE import

youtube_dl/extractor/extractors.py

@@ -1357,7 +1357,6 @@ from .vk import (
 from .vlive import (
     VLiveIE,
     VLiveChannelIE,
-    VLivePlaylistIE
 )
 from .vodlocker import VodlockerIE
 from .vodpl import VODPlIE