[test] Remove DirectGraphBuilder helper.

test/cctest/compiler/graph-builder-tester.h

Index: test/cctest/compiler/graph-builder-tester.h
diff --git a/test/cctest/compiler/graph-builder-tester.h b/test/cctest/compiler/graph-builder-tester.h
index ea8507ca7f0809c013588e734b718fe41bbdca73..ca50c9f4eb92d6a9bd4d9c68ae398f7662eabb24 100644
--- a/test/cctest/compiler/graph-builder-tester.h
+++ b/test/cctest/compiler/graph-builder-tester.h
@@ -19,21 +19,6 @@ namespace v8 {
 namespace internal {
 namespace compiler {
 
-// A class that just passes node creation on to the Graph.
-class DirectGraphBuilder : public GraphBuilder {
- public:
-  DirectGraphBuilder(Isolate* isolate, Graph* graph)
-      : GraphBuilder(isolate, graph) {}
-  virtual ~DirectGraphBuilder() {}
-
- protected:
-  virtual Node* MakeNode(const Operator* op, int value_input_count,
-                         Node** value_inputs, bool incomplete) final {
-    return graph()->NewNode(op, value_input_count, value_inputs, incomplete);
-  }
-};
-
-
 class MachineCallHelper : public CallHelper {
  public:
   MachineCallHelper(Isolate* isolate, MachineSignature* machine_sig);