Remove a dangling comment

BUG=aomedia:3068
Change-Id: I9a4458470692c7acc136180ee6cc952013f91ad5
diff --git a/av1/encoder/partition_search.c b/av1/encoder/partition_search.c
index 897d9ad..a15b099 100644
--- a/av1/encoder/partition_search.c
+++ b/av1/encoder/partition_search.c
@@ -3412,7 +3412,6 @@
   const BLOCK_SIZE bsize = blk_params.bsize;
   assert(bsize < BLOCK_SIZES_ALL);
 
-  // Set PARTITION_NONE allowed flag.
   if (!part_search_state->partition_none_allowed) return;
 
   int pt_cost = 0;