[cleanup] transitions/prototype info cannot be a tuple3

Change-Id: Id2266cb34b975bf7978c19cc4dde14e7befc787e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1883548Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64590}

src/profiler/heap-snapshot-generator.cc

@@ -1040,8 +1040,7 @@ void V8HeapExplorer::ExtractMapReferences(HeapEntry* entry, Map map) {
       TagObject(transitions, "(transition array)");
       SetInternalReference(entry, "transitions", transitions,
                            Map::kTransitionsOrPrototypeInfoOffset);
-    } else if (raw_transitions_or_prototype_info.IsTuple3() ||
-               raw_transitions_or_prototype_info.IsFixedArray()) {
+    } else if (raw_transitions_or_prototype_info.IsFixedArray()) {
       TagObject(raw_transitions_or_prototype_info, "(transition)");
       SetInternalReference(entry, "transition",
                            raw_transitions_or_prototype_info,