[stubs] Remove N-argument Hydrogen-based Array constructor stub

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 5e6b905af0e13f34ddf3a30e95238d5d176df6e6..48559b045d04bbf06a21a1b953cefd677af7bc45 100644
--- a/src/crankshaft/arm64/lithium-codegen-arm64.cc
+++ b/src/crankshaft/arm64/lithium-codegen-arm64.cc
@@ -364,15 +364,7 @@ void LCodeGen::DoCallNewArray(LCallNewArray* instr) {
   DCHECK(ToRegister(instr->constructor()).is(x1));
 
   __ Mov(x0, Operand(instr->arity()));
-  if (instr->arity() == 1) {
-    // We only need the allocation site for the case we have a length argument.
-    // The case may bail out to the runtime, which will determine the correct
-    // elements kind with the site.
-    __ Mov(x2, instr->hydrogen()->site());
-  } else {
-    __ LoadRoot(x2, Heap::kUndefinedValueRootIndex);
-  }
-
+  __ Mov(x2, instr->hydrogen()->site());
 
   ElementsKind kind = instr->hydrogen()->elements_kind();
   AllocationSiteOverrideMode override_mode =
@@ -405,7 +397,7 @@ void LCodeGen::DoCallNewArray(LCallNewArray* instr) {
     CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
     __ Bind(&done);
   } else {
-    ArrayNArgumentsConstructorStub stub(isolate(), kind, override_mode);
+    ArrayNArgumentsConstructorStub stub(isolate());
     CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
   }
   RecordPushedArgumentsDelta(instr->hydrogen()->argument_delta());