Remove support for SkPicture::clone().

src/core/SkPicture.cpp

Index: src/core/SkPicture.cpp
diff --git a/src/core/SkPicture.cpp b/src/core/SkPicture.cpp
index 19ff36d5a61583ffac3f58ce92d8955c6496acd2..eab0b927abd4b986b83cb4913bf9d6cc440b198c 100644
--- a/src/core/SkPicture.cpp
+++ b/src/core/SkPicture.cpp
@@ -280,13 +280,6 @@ SkPicture::~SkPicture() {
 }
 
 // fRecord OK
-#ifdef SK_SUPPORT_LEGACY_PICTURE_CLONE
-SkPicture* SkPicture::clone() const {
-    return SkRef(const_cast<SkPicture*>(this));
-}
-#endif//SK_SUPPORT_LEGACY_PICTURE_CLONE
-
-// fRecord OK
 void SkPicture::EXPERIMENTAL_addAccelData(const SkPicture::AccelData* data) const {
     fAccelData.reset(SkRef(data));
 }