Revert of Add SkRasterPipeline blitter.

src/core/SkCoreBlitters.h

Index: src/core/SkCoreBlitters.h
diff --git a/src/core/SkCoreBlitters.h b/src/core/SkCoreBlitters.h
index a784d4714aee39636b23d7b52c1e897f5d56aee7..8fcfde6f762acf035dac8e1b5af9135d3bd8f225 100644
--- a/src/core/SkCoreBlitters.h
+++ b/src/core/SkCoreBlitters.h
@@ -13,7 +13,6 @@
 #include "SkBlitRow.h"
 #include "SkShader.h"
 #include "SkSmallAllocator.h"
-#include <memory>
 
 class SkRasterBlitter : public SkBlitter {
 public:
@@ -211,8 +210,4 @@
                                 SkShader::Context* shaderContext,
                                 SkTBlitterAllocator* allocator);
 
-
-// Returns nullptr if no SkRasterPipeline blitter can be constructed for this paint.
-std::unique_ptr<SkBlitter> SkCreateRasterPipelineBlitter(const SkPixmap&, const SkPaint&);
-
 #endif