intra blocks disallowed inadvertently

At speed 6 the smallest partitioning was 16x16 and biggest
intra block was 8x8, essentially disallowing all intra blocks
which produces ugly artifacts when revealing new video.

Change-Id: I364042d4c64e09be0666ade64aac94d0a1b586cf

vp9/encoder/vp9_speed_features.c

@@ -288,7 +288,6 @@ static void set_rt_speed_feature(VP9_COMP *cpi, SPEED_FEATURES *sf,
 
     sf->tx_size_search_method = (cm->frame_type == KEY_FRAME) ?
         USE_LARGESTALL : USE_TX_8X8;
-    sf->max_intra_bsize = BLOCK_8X8;
 
     // This feature is only enabled when partition search is disabled.
     sf->reuse_inter_pred_sby = 1;