remove 565 effects shaders

src/effects/gradients/SkLinearGradient.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkLinearGradient_DEFINED
 #define SkLinearGradient_DEFINED
 
@@ skipping 17 matching lines @@
 public:
     SkLinearGradient(const SkPoint pts[2], const Descriptor&);
 
     size_t contextSize() const override;
 
     class LinearGradientContext : public SkGradientShaderBase::GradientShaderBaseContext {
     public:
         LinearGradientContext(const SkLinearGradient&, const ContextRec&);
 
         void shadeSpan(int x, int y, SkPMColor dstC[], int count) override;
-        void shadeSpan16(int x, int y, uint16_t dstC[], int count) override;
 
         struct Rec {
             Sk4fStorage fColor;
             float       fPos;
             float       fPosScale;
         };
     private:
         SkTDArray<Rec>  fRecs;
         bool            fApplyAlphaAfterInterp;
 
@@ skipping 21 matching lines @@
     Context* onCreateContext(const ContextRec&, void* storage) const override;
 
 private:
     friend class SkGradientShader;
     typedef SkGradientShaderBase INHERITED;
     const SkPoint fStart;
     const SkPoint fEnd;
 };
 
 #endif