cc/paint: Remove cc::PaintSurface.

cc/paint/paint_surface.cc

Index: cc/paint/paint_surface.cc
diff --git a/cc/paint/paint_surface.cc b/cc/paint/paint_surface.cc
deleted file mode 100644
index a46220ebafd7e120d1e5ca42169e389c3dab58bf..0000000000000000000000000000000000000000
--- a/cc/paint/paint_surface.cc
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright 2017 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 "cc/paint/paint_surface.h"
-
-namespace cc {
-
-PaintSurface::PaintSurface(sk_sp<SkSurface> surface)
-    : surface_(std::move(surface)) {}
-
-PaintSurface::~PaintSurface() = default;
-
-}  // namespace cc