[CLEANUP] Remove shim for Ember.Service
[CLEANUP] Remove shim for Ember.Service

Removes a shim for `Ember.Service`.

This isn't needed anymore since Ember 2.x+ all have `Ember.Service`
available.

rtablada/data,swarmbox/data,workmanw/data,Turbo87/ember-data,courajs/data,Eric-Guo/data,danmcclain/data,HeroicEric/data,davidpett/data,wecc/data,rtablada/data,wecc/data,Turbo87/ember-data,Eric-Guo/data,nickiaconis/data,tarzan/data,rtablada/data,arenoir/data,wecc/data,vikram7/data,workmanw/data,vikram7/data,davidpett/data,danmcclain/data,ryanpatrickcook/data,rtablada/data,davidpett/data,vikram7/data,danmcclain/data,tarzan/data,HeroicEric/data,arenoir/data,workmanw/data,danmcclain/data,HeroicEric/data,HeroicEric/data,courajs/data,tarzan/data,workmanw/data,swarmbox/data,swarmbox/data,vikram7/data,Turbo87/ember-data,arenoir/data,Eric-Guo/data,Eric-Guo/data,nickiaconis/data,arenoir/data,courajs/data,wecc/data,tarzan/data,Turbo87/ember-data,davidpett/data,ryanpatrickcook/data,ryanpatrickcook/data,swarmbox/data,nickiaconis/data,ryanpatrickcook/data,nickiaconis/data,courajs/data