Sharpen virtual calls to final methods.

Also remove unused instance resolution stub.

Change-Id: I2abb988d107e98ac0148fb81464b22622a468382
diff --git a/src/object.cc b/src/object.cc
index 85a2d0a..c91a371 100644
--- a/src/object.cc
+++ b/src/object.cc
@@ -481,8 +481,7 @@
     code = runtime->GetTracer()->GetSavedCodeFromMap(m);
   }
   // Peel off any resolution stub.
-  if (code == runtime->GetResolutionStubArray(Runtime::kStaticMethod)->GetData() ||
-      code == runtime->GetResolutionStubArray(Runtime::kInstanceMethod)->GetData()) {
+  if (code == runtime->GetResolutionStubArray(Runtime::kStaticMethod)->GetData()) {
     code = runtime->GetClassLinker()->GetOatCodeFor(m);
   }
   return code;