Revert of Continue learning for calls in optimized code when we have no type feedback.

src/arm64/lithium-codegen-arm64.cc

Index: src/arm64/lithium-codegen-arm64.cc
diff --git a/src/arm64/lithium-codegen-arm64.cc b/src/arm64/lithium-codegen-arm64.cc
index 3a34bf2ba159aa531a034ae675f5803a1ca95de1..3b7c29645068824c6887fe51bf615bd0c34f0922 100644
--- a/src/arm64/lithium-codegen-arm64.cc
+++ b/src/arm64/lithium-codegen-arm64.cc
@@ -410,29 +410,8 @@
   DCHECK(ToRegister(instr->result()).Is(x0));
 
   int arity = instr->arity();
-  CallFunctionFlags flags = instr->hydrogen()->function_flags();
-  if (instr->hydrogen()->HasVectorAndSlot()) {
-    Register slot_register = ToRegister(instr->temp_slot());
-    Register vector_register = ToRegister(instr->temp_vector());
-    DCHECK(slot_register.is(x3));
-    DCHECK(vector_register.is(x2));
-
-    Handle<TypeFeedbackVector> vector = instr->hydrogen()->feedback_vector();
-    int index = vector->GetIndex(instr->hydrogen()->slot());
-
-    __ Mov(vector_register, vector);
-    __ Mov(slot_register, Operand(Smi::FromInt(index)));
-
-    CallICState::CallType call_type =
-        (flags & CALL_AS_METHOD) ? CallICState::METHOD : CallICState::FUNCTION;
-
-    Handle<Code> ic =
-        CodeFactory::CallICInOptimizedCode(isolate(), arity, call_type).code();
-    CallCode(ic, RelocInfo::CODE_TARGET, instr);
-  } else {
-    CallFunctionStub stub(isolate(), arity, flags);
-    CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
-  }
+  CallFunctionStub stub(isolate(), arity, instr->hydrogen()->function_flags());
+  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
   after_push_argument_ = false;
 }