Fixup after merge

table/block_based/block_based_table_reader_sync_and_async.h

@@ -362,7 +362,6 @@ DEFINE_SYNC_AND_ASYNC(void, BlockBasedTable::MultiGet)
 
   // First check the full filter
   // If full filter not useful, Then go into each block
-  const bool no_io = read_options.read_tier == kBlockCacheTier;
   uint64_t tracing_mget_id = BlockCacheTraceHelper::kReservedGetId;
   if (sst_file_range.begin()->get_context) {
     tracing_mget_id = sst_file_range.begin()->get_context->get_tracing_get_id();
@@ -668,7 +667,7 @@ DEFINE_SYNC_AND_ASYNC(void, BlockBasedTable::MultiGet)
             biter->status().IsIncomplete()) {
           // couldn't get block from block_cache
           // Update Saver.state to Found because we are only looking for
-          // whether we can guarantee the key is not there when "no_io" is set
+          // whether we can guarantee the key is not there with kBlockCacheTier
           get_context->MarkKeyMayExist();
           break;
         }