Remove Cmd in GrTargetCommands that is no longer needed with GrCopySurfaceBatch

src/gpu/GrTargetCommands.cpp

Index: src/gpu/GrTargetCommands.cpp
diff --git a/src/gpu/GrTargetCommands.cpp b/src/gpu/GrTargetCommands.cpp
index befee7971cd9519b217c7d675218be72c106bcb5..4a64175a19ef6d8a348b1282daed691846ba523a 100644
--- a/src/gpu/GrTargetCommands.cpp
+++ b/src/gpu/GrTargetCommands.cpp
@@ -75,7 +75,3 @@ void GrTargetCommands::DrawPaths::execute(GrBatchFlushState* state) {
 void GrTargetCommands::DrawBatch::execute(GrBatchFlushState* state) {
     fBatch->draw(state);
 }
-
-void GrTargetCommands::CopySurface::execute(GrBatchFlushState* state) {
-    state->gpu()->copySurface(this->dst(), this->src(), fSrcRect, fDstPoint);
-}