Disable gpu-side clip mask merging in the clip mask manager

src/gpu/GrClipMaskManager.h

Index: src/gpu/GrClipMaskManager.h
diff --git a/src/gpu/GrClipMaskManager.h b/src/gpu/GrClipMaskManager.h
index 3ce3e72bf1c5c567ddbe25b2b48a7184d01604b6..515f4b65830bfa149d864aefdef99d90cdc4aa2a 100644
--- a/src/gpu/GrClipMaskManager.h
+++ b/src/gpu/GrClipMaskManager.h
@@ -133,14 +133,6 @@ private:
                      const SkClipStack::Element*,
                      GrPathRenderer* pr = nullptr);
 
-    // Determines whether it is possible to draw the element to both the stencil buffer and the
-    // alpha mask simultaneously. If so and the element is a path a compatible path renderer is
-    // also returned.
-    bool canStencilAndDrawElement(GrPipelineBuilder*,
-                                  GrTexture* target,
-                                  GrPathRenderer**,
-                                  const SkClipStack::Element*);
-
     void mergeMask(GrPipelineBuilder*,
                    GrTexture* dstMask,
                    GrTexture* srcMask,