Remove separate cache for clip mask textures

src/gpu/GrClipMaskCache.cpp

Index: src/gpu/GrClipMaskCache.cpp
diff --git a/src/gpu/GrClipMaskCache.cpp b/src/gpu/GrClipMaskCache.cpp
deleted file mode 100644
index 42a5d46c4a790ae916a1c01bc767b597d2afee4f..0000000000000000000000000000000000000000
--- a/src/gpu/GrClipMaskCache.cpp
+++ /dev/null
@@ -1,19 +0,0 @@
-
-/*
- * Copyright 2012 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "GrClipMaskCache.h"
-
-GrClipMaskCache::GrClipMaskCache(GrResourceProvider* resourceProvider)
-    : fStack(sizeof(GrClipStackFrame))
-    , fResourceProvider(resourceProvider) {
-    // We need an initial frame to capture the clip state prior to
-    // any pushes
-    new (fStack.push_back()) GrClipStackFrame;
-}
-
-void GrClipMaskCache::push() { new (fStack.push_back()) GrClipStackFrame; }