Remove min texture size support

src/image/SkImage_Gpu.cpp

Index: src/image/SkImage_Gpu.cpp
diff --git a/src/image/SkImage_Gpu.cpp b/src/image/SkImage_Gpu.cpp
index e5f3aeea25bd33ea29863618ef4e601e9e4823a7..8e5ce4564c24afdfab2ebbc212a90748ef73632d 100644
--- a/src/image/SkImage_Gpu.cpp
+++ b/src/image/SkImage_Gpu.cpp
@@ -87,8 +87,6 @@ public:
     {}
 
 protected:
-    GrTexture* peekOriginalTexture() override { return fOriginal; }
-
     GrTexture* refOriginalTexture(GrContext* ctx) override {
         return SkRef(fOriginal);
     }
@@ -101,10 +99,6 @@ protected:
         as_IB(fImage)->notifyAddedToCache();
     }
 
-    bool getROBitmap(SkBitmap* bitmap) override {
-        return as_IB(fImage)->getROPixels(bitmap);
-    }
-
 private:
     const SkImage*  fImage;
     GrTexture*      fOriginal;