Remove deprecated modules

These three modules are well over their deprecation dates. Making good
on that threat now.

  * bypassuac: Marked for removal on 2013-01-04
    * Replaced by `exploit/windows/local/bypassuac`
  * service_permissions: Marked for removal on 2013-01-10
    * Replaced by `exploit/windows/local/service_permissions`
  * ms10_092_schelevator: Marked for removal on 2013-06-01
    * Replaced by `exploit/windows/local/ms10_092_schelevator`