Only create arguments-maps in the bootstrapper, remove now obsolete ValueType flag.

test/cctest/test-alloc.cc

Index: test/cctest/test-alloc.cc
diff --git a/test/cctest/test-alloc.cc b/test/cctest/test-alloc.cc
index f80e6a5a7f74781ef93febe7403c81fde9f500c8..f26c4615a73401ccb027c9beb1a3d5577cd4c587 100644
--- a/test/cctest/test-alloc.cc
+++ b/test/cctest/test-alloc.cc
@@ -50,7 +50,6 @@ static AllocationResult AllocateAfterFailures() {
   // for specific kinds.
   heap->AllocateFixedArray(100).ToObjectChecked();
   heap->AllocateHeapNumber(0.42).ToObjectChecked();
-  heap->AllocateArgumentsObject(Smi::FromInt(87), 10).ToObjectChecked();
   Object* object = heap->AllocateJSObject(
       *CcTest::i_isolate()->object_function()).ToObjectChecked();
   heap->CopyJSObject(JSObject::cast(object)).ToObjectChecked();