Build fix. Remove unused variable.

TBR=erik.corry@gmail.com
Review URL: http://codereview.chromium.org/2058005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4646 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/virtual-frame-arm.cc

@@ -635,7 +635,6 @@ void VirtualFrame::EmitPush(Register reg) {
 
 
 void VirtualFrame::SetElementAt(Register reg, int this_far_down) {
-  int virtual_elements = kVirtualElements[top_of_stack_state_];
   if (this_far_down == 0) {
     Pop();
     Register dest = GetTOSRegister();