[stubs] Remove the is_jsarray bit from the TransitionElementsKindStub.

src/crankshaft/arm64/lithium-codegen-arm64.cc

Index: src/crankshaft/arm64/lithium-codegen-arm64.cc
diff --git a/src/crankshaft/arm64/lithium-codegen-arm64.cc b/src/crankshaft/arm64/lithium-codegen-arm64.cc
index 86c131c618eea517d9e44f9ed8ae97713466ccf9..3cee77b61687b539ff28820b8225fea8cd1bc65c 100644
--- a/src/crankshaft/arm64/lithium-codegen-arm64.cc
+++ b/src/crankshaft/arm64/lithium-codegen-arm64.cc
@@ -5457,8 +5457,7 @@ void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
     DCHECK(ToRegister(instr->context()).is(cp));
     PushSafepointRegistersScope scope(this);
     __ Mov(x1, Operand(to_map));
-    bool is_js_array = from_map->instance_type() == JS_ARRAY_TYPE;
-    TransitionElementsKindStub stub(isolate(), from_kind, to_kind, is_js_array);
+    TransitionElementsKindStub stub(isolate(), from_kind, to_kind);
     __ CallStub(&stub);
     RecordSafepointWithRegisters(
         instr->pointer_map(), 0, Safepoint::kLazyDeopt);