avcodec/vc1: Remove always-false check

Added in b50be4e38d;
this check was racy back then (as the VLC could be initialized
concurrently) and it is redundant (always-false)
since commit c742ab4e81.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/vc1.c

@@ -933,8 +933,6 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
     v->rnd = get_bits1(gb);
     if (v->interlace)
         v->uvsamp = get_bits1(gb);
-    if(!ff_vc1_bfraction_vlc.table)
-        return 0; //parsing only, vlc tables havnt been allocated
     if (v->field_mode) {
         if (!v->refdist_flag)
             v->refdist = 0;