[turbofan] Remove a bogus comment.

R=sigurds@chromium.org

Change-Id: Ia89018f414f83665e836eb1d1ead036fc5043d0a
Reviewed-on: https://chromium-review.googlesource.com/c/1466501Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59524}

src/compiler/js-native-context-specialization.cc

@@ -1498,7 +1498,6 @@ Reduction JSNativeContextSpecialization::ReduceElementAccess(
     value = BuildIndexedStringLoad(receiver, index, length, &effect, &control,
                                    load_mode);
   } else {
-    // Retrieve the native context from the given {node}.
     // Compute element access infos for the receiver maps.
     AccessInfoFactory access_info_factory(
         broker(), dependencies(), native_context().object(), graph()->zone());