Remove convertToSkiaFilterLevel()

Source/platform/graphics/skia/SkiaUtils.h

 /*
  * Copyright (c) 2006,2007,2008, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 77 matching lines @@
 
 // Determine if a given WebKit point is contained in a path
 bool PLATFORM_EXPORT SkPathContainsPoint(const SkPath&, const FloatPoint&, SkPath::FillType);
 
 SkMatrix PLATFORM_EXPORT affineTransformToSkMatrix(const AffineTransform&);
 
 bool nearlyIntegral(float value);
 
 InterpolationQuality limitInterpolationQuality(const GraphicsContext*, InterpolationQuality resampling);
 
-SkPaint::FilterLevel convertToSkiaFilterLevel(bool useBicubicFilter, InterpolationQuality resampling);
-
 InterpolationQuality computeInterpolationQuality(
     const SkMatrix&,
     float srcWidth,
     float srcHeight,
     float destWidth,
     float destHeight,
     bool isDataComplete = true);
 
 bool shouldDrawAntiAliased(const GraphicsContext*, const SkRect& destRect);
 
 }  // namespace blink
 
 #endif  // SkiaUtils_h