diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 02ebb79c46..d969feb794 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -5144,11 +5144,6 @@ bool Genesis::ConfigureGlobalObjects(
   native_context()->set_js_map_map(js_map_fun->initial_map());
   native_context()->set_js_set_map(js_set_fun->initial_map());
 
-  Handle<JSFunction> js_array_constructor(native_context()->array_function());
-  Handle<JSObject> js_array_prototype(
-      JSObject::cast(js_array_constructor->instance_prototype()));
-  native_context()->set_initial_array_prototype_map(js_array_prototype->map());
-
   return true;
 }
 
diff --git a/src/code-stub-assembler.cc b/src/code-stub-assembler.cc
index 1507953571..41d8ee51a6 100644
--- a/src/code-stub-assembler.cc
+++ b/src/code-stub-assembler.cc
@@ -1355,27 +1355,6 @@ TNode<BoolT> CodeStubAssembler::HasInstanceType(SloppyTNode<HeapObject> object,
   return InstanceTypeEqual(LoadInstanceType(object), instance_type);
 }
 
-TNode<BoolT>
-CodeStubAssembler::InitialArrayPrototypeHasInitialArrayPrototypeMap(
-    TNode<Context> native_context) {
-  CSA_ASSERT(this, IsNativeContext(native_context));
-  TNode<Map> proto_map = LoadMap(CAST(LoadContextElement(
-      native_context, Context::INITIAL_ARRAY_PROTOTYPE_INDEX)));
-  TNode<Map> initial_map = CAST(LoadContextElement(
-      native_context, Context::INITIAL_ARRAY_PROTOTYPE_MAP_INDEX));
-  return WordEqual(proto_map, initial_map);
-}
-
-TNode<BoolT> CodeStubAssembler::HasInitialFastElementsKindMap(
-    TNode<Context> native_context, TNode<JSArray> jsarray) {
-  CSA_ASSERT(this, IsNativeContext(native_context));
-  TNode<Map> map = LoadMap(jsarray);
-  TNode<Int32T> elements_kind = LoadMapElementsKind(map);
-  TNode<Map> initial_jsarray_element_map =
-      LoadJSArrayElementsMap(elements_kind, native_context);
-  return WordEqual(initial_jsarray_element_map, map);
-}
-
 TNode<BoolT> CodeStubAssembler::DoesntHaveInstanceType(
     SloppyTNode<HeapObject> object, InstanceType instance_type) {
   return Word32NotEqual(LoadInstanceType(object), Int32Constant(instance_type));
diff --git a/src/code-stub-assembler.h b/src/code-stub-assembler.h
index 076b999c3d..575adf0990 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -571,12 +571,6 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
   // Compare the instance the type of the object against the provided one.
   TNode<BoolT> HasInstanceType(SloppyTNode<HeapObject> object,
                                InstanceType type);
-  // Determines whether Array's prototype has changed.
-  TNode<BoolT> InitialArrayPrototypeHasInitialArrayPrototypeMap(
-      TNode<Context> native_context);
-  // Determines whether an array's elements map has changed.
-  TNode<BoolT> HasInitialFastElementsKindMap(TNode<Context> native_context,
-                                             TNode<JSArray> jsarray);
   TNode<BoolT> DoesntHaveInstanceType(SloppyTNode<HeapObject> object,
                                       InstanceType type);
   TNode<BoolT> TaggedDoesntHaveInstanceType(SloppyTNode<HeapObject> any_tagged,
diff --git a/src/contexts.h b/src/contexts.h
index af178e04e7..4cfbb29f06 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -158,7 +158,6 @@ enum ContextLookupFlags {
   V(INITIAL_ARRAY_ITERATOR_PROTOTYPE_INDEX, JSObject,                          \
     initial_array_iterator_prototype)                                          \
   V(INITIAL_ARRAY_PROTOTYPE_INDEX, JSObject, initial_array_prototype)          \
-  V(INITIAL_ARRAY_PROTOTYPE_MAP_INDEX, Map, initial_array_prototype_map)       \
   V(INITIAL_ERROR_PROTOTYPE_INDEX, JSObject, initial_error_prototype)          \
   V(INITIAL_GENERATOR_PROTOTYPE_INDEX, JSObject, initial_generator_prototype)  \
   V(INITIAL_ASYNC_GENERATOR_PROTOTYPE_INDEX, JSObject,                         \