Remove GrTextureStorageAllocator. This was added from Chromium but never used and not expected to b…

src/gpu/SkGrPixelRef.cpp

Index: src/gpu/SkGrPixelRef.cpp
diff --git a/src/gpu/SkGrPixelRef.cpp b/src/gpu/SkGrPixelRef.cpp
index d01554b0a86fb7934b4b0ce38f649c36dc0e11c6..df720da55119d656521765eaaf8ab0667bb078b0 100644
--- a/src/gpu/SkGrPixelRef.cpp
+++ b/src/gpu/SkGrPixelRef.cpp
@@ -75,7 +75,6 @@ static SkGrPixelRef* copy_to_new_texture_pixelref(GrTexture* texture, SkColorTyp
     }
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fConfig = SkImageInfo2GrPixelConfig(dstCT, kPremul_SkAlphaType, dstPT, *context->caps());
-    desc.fTextureStorageAllocator = texture->desc().fTextureStorageAllocator;
     desc.fIsMipMapped = false;
 
     GrTexture* dst = context->textureProvider()->createTexture(desc, SkBudgeted::kNo, nullptr, 0);