Revert of Add additive animation support for CSS property background-position

third_party/WebKit/Source/core/animation/CSSPositionAxisListInterpolationType.h

Index: third_party/WebKit/Source/core/animation/CSSPositionAxisListInterpolationType.h
diff --git a/third_party/WebKit/Source/core/animation/CSSPositionAxisListInterpolationType.h b/third_party/WebKit/Source/core/animation/CSSPositionAxisListInterpolationType.h
deleted file mode 100644
index b42b131781cbdde6dfb9fdc8b875a375afce658b..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/animation/CSSPositionAxisListInterpolationType.h
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2016 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.
-
-#ifndef CSSPositionAxisListInterpolationType_h
-#define CSSPositionAxisListInterpolationType_h
-
-#include "core/animation/CSSLengthListInterpolationType.h"
-
-namespace blink {
-
-class CSSPositionAxisListInterpolationType : public CSSLengthListInterpolationType {
-public:
-    CSSPositionAxisListInterpolationType(CSSPropertyID property)
-        : CSSLengthListInterpolationType(property)
-    { }
-
-private:
-    InterpolationValue maybeConvertValue(const CSSValue&, const StyleResolverState&, ConversionCheckers&) const final;
-};
-
-} // namespace blink
-
-#endif // CSSPositionAxisListInterpolationType_h