Update obsolete comment that still referred to CheckpointLock

hlinnaka · hlinnaka · commit 99da905d5c43 · 2021-07-30T12:53:03.000+03:00
CheckpointLock was removed in commit d18e756, and commit ce197e9 updated a leftover comment in CreateCheckPoint, but there was another copy of it in CreateRestartPoint still.
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
@@ -9664,7 +9664,7 @@ CreateRestartPoint(int flags)
 	if (EnableHotStandby)
 		TruncateSUBTRANS(GetOldestTransactionIdConsideredRunning());
 
-	/* Real work is done, but log and update before releasing lock. */
+	/* Real work is done; log and update stats. */
 	LogCheckpointEnd(true);
 
 	/* Reset the process title */
