Make ARM simulator compile on Windows.

Remove suspicious line from ARM simulator, which caused a compiler warning on Windows.
Review URL: http://codereview.chromium.org/173464

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2756 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/simulator-arm.cc

@@ -1051,7 +1051,6 @@ void Simulator::SoftwareInterrupt(Instr* instr) {
         }
         set_register(r0, lo_res);
         set_register(r1, hi_res);
-        set_register(r0, result);
       }
       set_register(lr, saved_lr);
       set_pc(get_register(lr));