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

tools/clang/blink_gc_plugin/tests/pure_virtual_trace.h

Index: tools/clang/blink_gc_plugin/tests/pure_virtual_trace.h
diff --git a/tools/clang/blink_gc_plugin/tests/pure_virtual_trace.h b/tools/clang/blink_gc_plugin/tests/pure_virtual_trace.h
deleted file mode 100644
index 356a95e1dc55be390e044681638a0d0489e2143f..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/pure_virtual_trace.h
+++ /dev/null
@@ -1,19 +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 PURE_VIRTUAL_TRACE_H_
-#define PURE_VIRTUAL_TRACE_H_
-
-#include "heap/stubs.h"
-
-namespace blink {
-
-class A : public GarbageCollected<A> {
-public:
-    virtual void trace(Visitor*) = 0;
-};
-
-}
-
-#endif