[turbofan] Fix a comment

R=jarin

Change-Id: I36d4952f351cfa428532cfd56ecbb10c9fe3d39a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1588469
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61154}

src/compiler/node-properties.h

@@ -148,8 +148,7 @@ class V8_EXPORT_PRIVATE NodeProperties final {
   enum InferReceiverMapsResult {
     kNoReceiverMaps,         // No receiver maps inferred.
     kReliableReceiverMaps,   // Receiver maps can be trusted.
-    kUnreliableReceiverMaps  // Receiver maps might have changed (side-effect),
-                             // but instance type is reliable.
+    kUnreliableReceiverMaps  // Receiver maps might have changed (side-effect).
   };
   static InferReceiverMapsResult InferReceiverMaps(
       JSHeapBroker* broker, Node* receiver, Node* effect,