Remove parts of //cc we aren't using

cc/layers/layer_position_constraint.cc

-// Copyright 2013 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/layers/layer_position_constraint.h"
-
-namespace cc {
-
-LayerPositionConstraint::LayerPositionConstraint()
-    : is_fixed_position_(false),
-      is_fixed_to_right_edge_(false),
-      is_fixed_to_bottom_edge_(false) {
-}
-
-bool LayerPositionConstraint::operator==(
-    const LayerPositionConstraint& other) const {
-  if (!is_fixed_position_ && !other.is_fixed_position_)
-    return true;
-  return is_fixed_position_ == other.is_fixed_position_ &&
-          is_fixed_to_right_edge_ == other.is_fixed_to_right_edge_ &&
-          is_fixed_to_bottom_edge_ == other.is_fixed_to_bottom_edge_;
-}
-
-bool LayerPositionConstraint::operator!=(
-    const LayerPositionConstraint& other) const {
-  return !(*this == other);
-}
-
-}  // namespace cc