Remove tools/clang (this will break things temporarily).

tools/clang/blink_gc_plugin/tests/cycle_super_neg.h

Index: tools/clang/blink_gc_plugin/tests/cycle_super_neg.h
diff --git a/tools/clang/blink_gc_plugin/tests/cycle_super_neg.h b/tools/clang/blink_gc_plugin/tests/cycle_super_neg.h
deleted file mode 100644
index 6f99eff69fc716baf6ceda0df7da78953101a010..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/cycle_super_neg.h
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CYCLE_SUPER_NEG_H_
-#define CYCLE_SUPER_NEG_H_
-
-#include "heap/stubs.h"
-
-namespace blink {
-
-class C;
-
-// The chain:
-//   C -per-> B -sup-> A -sub-> D -ref-> C
-// is not a leaking cycle, because the super-class relationship
-// should not transitively imply sub-class relationships.
-// I.e. B -/-> D
-
-class A : public GarbageCollectedFinalized<A> {
-public:
-    virtual void trace(Visitor*) {}
-};
-
-class B : public A {
-public:
-    virtual void trace(Visitor*);
-};
-
-class C : public RefCounted<C> {
-private:
-    Persistent<B> m_b;
-};
-
-class D : public A {
-public:
-    virtual void trace(Visitor*);
-private:
-    RefPtr<C> m_c;
-};
-
-}
-
-#endif