Remove the last remnant of paint phases.

sky/engine/core/rendering/PaintPhase.h

Index: sky/engine/core/rendering/PaintPhase.h
diff --git a/sky/engine/core/rendering/PaintPhase.h b/sky/engine/core/rendering/PaintPhase.h
deleted file mode 100644
index 59050490076531af2eec754378a0eabafc688388..0000000000000000000000000000000000000000
--- a/sky/engine/core/rendering/PaintPhase.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
- *           (C) 2000 Antti Koivisto (koivisto@kde.org)
- *           (C) 2000 Dirk Mueller (mueller@kde.org)
- *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
- * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
- * Copyright (C) 2009 Google Inc. All rights reserved.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- */
-
-#ifndef SKY_ENGINE_CORE_RENDERING_PAINTPHASE_H_
-#define SKY_ENGINE_CORE_RENDERING_PAINTPHASE_H_
-
-namespace blink {
-
-/*
- *  The painting of a layer occurs in three distinct phases.  Each phase involves
- *  a recursive descent into the layer's render objects. The first phase is the background phase.
- *  The backgrounds and borders of all blocks are painted.  Inlines are not painted at all.
- *  Floats must paint above block backgrounds but entirely below inline content that can overlap them.
- *  In the foreground phase, all inlines are fully painted.  Inline replaced elements will get all
- *  three phases invoked on them during this phase.
- */
-
-enum PaintPhase {
-    PaintPhaseForeground,
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_CORE_RENDERING_PAINTPHASE_H_