Revert "avcodec/av1dec: Check tile_cols"

This reverts commit 4fdfe430c1.

The previous commit ensures this field will never be zero.

Signed-off-by: James Almer <jamrial@gmail.com>

libavcodec/av1dec.c

@@ -398,9 +398,6 @@ static int get_tiles_info(AVCodecContext *avctx, const AV1RawTileGroup *tile_gro
     s->tg_start = tile_group->tg_start;
     s->tg_end = tile_group->tg_end;
 
-    if (s->raw_frame_header->tile_cols == 0)
-        return AVERROR_INVALIDDATA;
-
     for (tile_num = tile_group->tg_start; tile_num <= tile_group->tg_end; tile_num++) {
         tile_row = tile_num / s->raw_frame_header->tile_cols;
         tile_col = tile_num % s->raw_frame_header->tile_cols;