Revert of Begin instanced rendering for simple shapes

src/gpu/GrDrawContextPriv.h

Index: src/gpu/GrDrawContextPriv.h
diff --git a/src/gpu/GrDrawContextPriv.h b/src/gpu/GrDrawContextPriv.h
index c77d8e488b461d7aa3fc79ed8918b820812682b9..8087bcf58827ec91f2a7a6dc27f7974128209963 100644
--- a/src/gpu/GrDrawContextPriv.h
+++ b/src/gpu/GrDrawContextPriv.h
@@ -9,7 +9,6 @@
 #define GrDrawContextPriv_DEFINED
 
 #include "GrDrawContext.h"
-#include "GrDrawTarget.h"
 #include "GrPathRendering.h"
 
 class GrFixedClip;
@@ -21,10 +20,6 @@
     data members or virtual methods. */
 class GrDrawContextPriv {
 public:
-    gr_instanced::InstancedRendering* accessInstancedRendering() const {
-        return fDrawContext->getDrawTarget()->instancedRendering();
-    }
-
     void clearStencilClip(const SkIRect& rect, bool insideClip);
 
     void stencilRect(const GrFixedClip& clip,