remove mention of 16-bit shader procs

This is all dead.

Change-Id: Ifef5edb5c2402118cb289bbe31923f8de56bab23
Reviewed-on: https://skia-review.googlesource.com/c/171240
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>

src/core/SkBitmapProcState.cpp

@@ -161,7 +161,6 @@ bool SkBitmapProcState::chooseProcs() {
     fAlphaScale = SkAlpha255To256(SkColorGetA(fPaintColor));
 
     fShaderProc32 = nullptr;
-    fShaderProc16 = nullptr;
     fSampleProc32 = nullptr;
 
     const bool trivialMatrix = (fInvMatrix.getType() & ~SkMatrix::kTranslate_Mask) == 0;

src/core/SkBitmapProcState.h

@@ -64,8 +64,6 @@ struct SkBitmapProcState : public SkBitmapProcInfo {
 
     typedef void (*ShaderProc32)(const void* ctx, int x, int y, SkPMColor[], int count);
 
-    typedef void (*ShaderProc16)(const void* ctx, int x, int y, uint16_t[], int count);
-
     typedef void (*MatrixProc)(const SkBitmapProcState&,
                                uint32_t bitmapXY[],
                                int count,
@@ -98,10 +96,8 @@ struct SkBitmapProcState : public SkBitmapProcInfo {
         following fields:
 
         fShaderProc32
-        fShaderProc16
         fMatrixProc
         fSampleProc32
-        fSampleProc32
 
         They will already have valid function pointers, so a platform that does
         not have an accelerated version can just leave that field as is. A valid
@@ -123,7 +119,6 @@ struct SkBitmapProcState : public SkBitmapProcInfo {
     // If a shader proc is present, then the corresponding matrix/sample procs
     // are ignored
     ShaderProc32 getShaderProc32() const { return fShaderProc32; }
-    ShaderProc16 getShaderProc16() const { return fShaderProc16; }
 
 #ifdef SK_DEBUG
     MatrixProc getMatrixProc() const;
@@ -134,7 +129,6 @@ struct SkBitmapProcState : public SkBitmapProcInfo {
 
 private:
     ShaderProc32        fShaderProc32;      // chooseProcs
-    ShaderProc16        fShaderProc16;      // chooseProcs
     // These are used if the shaderproc is nullptr
     MatrixProc          fMatrixProc;        // chooseProcs
     SampleProc32        fSampleProc32;      // chooseProcs

src/opts/SkBitmapProcState_opts_none.cpp

@@ -13,10 +13,8 @@
     current state (e.g. fBitmap, fInvMatrix, etc.)
 
     fShaderProc32
-    fShaderProc16
     fMatrixProc
     fSampleProc32
-    fSampleProc32
  */
 
 // empty implementation just uses default supplied function pointers