Revert "Make FrameStates recursive (to be used for inlining)."

src/compiler/raw-machine-assembler.h

Index: src/compiler/raw-machine-assembler.h
diff --git a/src/compiler/raw-machine-assembler.h b/src/compiler/raw-machine-assembler.h
index 9cb394e8b387024b4f6e057bc4a7e95b0b204271..04e0fee704e9c7904c2aefc3f44732a67cd32e27 100644
--- a/src/compiler/raw-machine-assembler.h
+++ b/src/compiler/raw-machine-assembler.h
@@ -64,12 +64,6 @@ class RawMachineAssembler : public GraphBuilder,
     return call_descriptor_builder_->parameter_types();
   }
 
-  Node* UndefinedConstant() {
-    PrintableUnique<Object> unique = PrintableUnique<Object>::CreateImmovable(
-        zone(), isolate()->factory()->undefined_value());
-    return NewNode(common()->HeapConstant(unique));
-  }
-
   // Parameters.
   Node* Parameter(int index);