Remove WorkingCopyBaseService
The Service was probably introduced when MergeRequests still cared about working copies, but right now it seems like their methods fit better in the MergeRequesBaseService.
/cc @reprazent
The Service was probably introduced when MergeRequests still cared about working copies, but right now it seems like their methods fit better in the MergeRequesBaseService.
/cc @reprazent