Revert of [TypeFeedbackVector] Root literal arrays in function literals slots

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 64d0a93cc832bec9ba50a10654e26cf7d837d42f..5ad593bfa6630d6fe0df69e71a15f6d8efe4a722 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -3505,16 +3505,12 @@
   return reinterpret_cast<LiteralsArray*>(object);
 }
 
-bool LiteralsArray::has_feedback_vector() const {
-  return !get(kVectorIndex)->IsUndefined(this->GetIsolate());
-}
 
 TypeFeedbackVector* LiteralsArray::feedback_vector() const {
-  if (length() == 0 || !has_feedback_vector()) {
+  if (length() == 0) {
     return TypeFeedbackVector::cast(
-        this->GetIsolate()->heap()->empty_type_feedback_vector());
-  }
-
+        const_cast<FixedArray*>(FixedArray::cast(this)));
+  }
   return TypeFeedbackVector::cast(get(kVectorIndex));
 }
 
@@ -6661,13 +6657,6 @@
   }
 }
 
-bool JSFunction::has_literals_array() const {
-  SharedFunctionInfo* shared = this->shared();
-
-  return (literals() != shared->GetIsolate()->heap()->empty_literals_array() ||
-          (shared->feedback_metadata()->slot_count() == 0 &&
-           shared->num_literals() == 0));
-}
 
 Context* JSFunction::context() {
   return Context::cast(READ_FIELD(this, kContextOffset));