remove std::move()

Summary:
follow up from https://www.internalfb.com/diff/D67976583?dst_version_fbid=541757102157105&transaction_fbid=1663800114483059

simonmar:
> oh I just noticed, this std::move() is redundant (it's an integral type so no need to move it)

Reviewed By: bochko

Differential Revision: D68094334

fbshipit-source-id: 3b7bec7cec0568ce980b67af2f7c2f4674b43e18

glean/rts/query.cpp

@@ -495,7 +495,7 @@ std::unique_ptr<QueryResults> QueryExecutor::finish(
   res->nested_fact_pids = std::move(nested_result_pids);
   res->nested_fact_keys = std::move(nested_result_keys);
   res->nested_fact_values = std::move(nested_result_values);
-  res->result_bytes = std::move(result_bytes);
+  res->result_bytes = result_bytes;
 
   if (cont.hasValue()) {
     res->continuation = cont->string();