Enable adaptive_rd_thresh for row-mt

Change-Id: Id70c5264a653304c92600ef2ed7f0818b7be35f7
diff --git a/av1/encoder/speed_features.c b/av1/encoder/speed_features.c
index 6d72084..ca67d33 100644
--- a/av1/encoder/speed_features.c
+++ b/av1/encoder/speed_features.c
@@ -876,7 +876,6 @@
   if (cpi->oxcf.using_dist_8x8) x->min_partition_size = BLOCK_8X8;
 #endif  // CONFIG_DIST_8X8
   if (cpi->oxcf.row_mt == 1 && (cpi->oxcf.max_threads > 1)) {
-    sf->adaptive_rd_thresh = 0;
     if (sf->inter_mode_rd_model_estimation == 1) {
       // Revert to type 2
       sf->inter_mode_rd_model_estimation = 2;