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

tools/clang/blink_gc_plugin/Config.cpp

Index: tools/clang/blink_gc_plugin/Config.cpp
diff --git a/tools/clang/blink_gc_plugin/Config.cpp b/tools/clang/blink_gc_plugin/Config.cpp
deleted file mode 100644
index 0a6d5b72fd4b3f1a4988bacea4cdc1e6693ad65c..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/Config.cpp
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright 2015 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.
-
-#include "Config.h"
-
-#include <cassert>
-
-#include "clang/AST/AST.h"
-
-using namespace clang;
-
-bool Config::IsTemplateInstantiation(CXXRecordDecl* record) {
-  ClassTemplateSpecializationDecl* spec =
-      dyn_cast<clang::ClassTemplateSpecializationDecl>(record);
-  if (!spec)
-    return false;
-  switch (spec->getTemplateSpecializationKind()) {
-    case TSK_ImplicitInstantiation:
-    case TSK_ExplicitInstantiationDefinition:
-      return true;
-    case TSK_Undeclared:
-    case TSK_ExplicitSpecialization:
-      return false;
-    // TODO: unsupported cases.
-    case TSK_ExplicitInstantiationDeclaration:
-      return false;
-  }
-  assert(false && "Unknown template specialization kind");
-  return false;
-}