Remove stray GVN flag in TransitionElementsKind

TBR=mstarzinger@chromium.org
BUG=none
TEST=build turns green

Review URL: https://chromiumcodereview.appspot.com/9270010

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10464 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/hydrogen-instructions.h

@@ -4127,7 +4127,6 @@ class HTransitionElementsKind: public HTemplateInstruction<1> {
         transitioned_map_(transitioned_map) {
     SetOperandAt(0, object);
     SetFlag(kUseGVN);
-    SetGVNFlag(kChangesMaps);
     SetGVNFlag(kChangesElementsKind);
     set_representation(Representation::Tagged());
   }