Remove unused NeedsDeepCopy.

src/core/SkPaintPriv.h

Index: src/core/SkPaintPriv.h
diff --git a/src/core/SkPaintPriv.h b/src/core/SkPaintPriv.h
index 9668fef127514572262ee89c6897a1bebe1e574e..38c9063e5665b0601b5221910246f653a06712f3 100644
--- a/src/core/SkPaintPriv.h
+++ b/src/core/SkPaintPriv.h
@@ -22,11 +22,4 @@ class SkPaint;
 */
 bool isPaintOpaque(const SkPaint* paint,
                    const SkBitmap* bmpReplacesShader = NULL);
-
-/** Returns true if the provided paint has fields which are not
-    immutable (and will thus require deep copying).
-    @param paint the paint to be analyzed
-    @return true if the paint requires a deep copy
-*/
-bool NeedsDeepCopy(const SkPaint& paint);
 #endif