Revert of Update SkPicture cull rects with RTree information

src/core/SkRTree.h

Index: src/core/SkRTree.h
diff --git a/src/core/SkRTree.h b/src/core/SkRTree.h
index 9a118d4897b54a1bbd7788c814181fae31236526..320b0bd438e8f627a71f01435d69846ed9e1de6e 100644
--- a/src/core/SkRTree.h
+++ b/src/core/SkRTree.h
@@ -52,9 +52,6 @@
     // Insertion count (not overall node count, which may be greater).
     int getCount() const { return fCount; }
 
-    // Get the root bound.
-    SkRect getRootBound() const SK_OVERRIDE;
-
     // These values were empirically determined to produce reasonable performance in most cases.
     static const int kMinChildren = 6,
                      kMaxChildren = 11;