Remove specific cache_key implementation for Translations to unbreak tests
Remove specific cache_key implementation for Translations to unbreak tests

The default from CachingMixin is fine, and actually better because it uses
.pk instead of .id. The real magic is in self._cache_key().

kmaglione/olympia,kumar303/olympia,clouserw/zamboni,andymckay/olympia,Joergen/olympia,eviljeff/zamboni,koehlermichael/olympia,diox/olympia,wagnerand/addons-server,andymckay/addons-server,mozilla/olympia,robhudson/zamboni,crdoconnor/olympia,Nolski/olympia,bqbn/addons-server,washort/zamboni,wagnerand/olympia,wagnerand/zamboni,muffinresearch/olympia,diox/olympia,mrrrgn/olympia,kmaglione/olympia,crdoconnor/olympia,eviljeff/zamboni,ayushagrawal288/zamboni,mstriemer/olympia,tsl143/addons-server,harikishen/addons-server,shahbaz17/zamboni,ayushagrawal288/zamboni,kumar303/addons-server,mudithkr/zamboni,Joergen/zamboni,tsl143/zamboni,kumar303/zamboni,mrrrgn/olympia,muffinresearch/olympia,jpetto/olympia,muffinresearch/addons-server,diox/zamboni,johancz/olympia,spasovski/zamboni,luckylavish/zamboni,Prashant-Surya/addons-server,SuriyaaKudoIsc/olympia,yfdyh000/olympia,Hitechverma/zamboni,Nolski/olympia,koehlermichael/olympia,kmaglione/olympia,Joergen/zamboni,wagnerand/addons-server,tsl143/zamboni,mozilla/olympia,Revanth47/addons-server,SuriyaaKudoIsc/olympia,anaran/olympia,washort/zamboni,wagnerand/olympia,wagnerand/zamboni,ingenioustechie/zamboni,andymckay/zamboni,johancz/olympia,shahbaz17/zamboni,crdoconnor/olympia,mdaif/olympia,lavish205/olympia,wagnerand/zamboni,mstriemer/olympia,koehlermichael/olympia,spasovski/zamboni,tsl143/zamboni,bqbn/addons-server,jpetto/olympia,koehlermichael/olympia,spasovski/zamboni,harry-7/addons-server,shahbaz17/zamboni,diox/olympia,andymckay/olympia,mozilla/zamboni,mozilla/addons-server,psiinon/addons-server,muffinresearch/olympia,eviljeff/olympia,mudithkr/zamboni,jamesthechamp/zamboni,kumar303/olympia,jasonthomas/zamboni,spasovski/zamboni,lavish205/olympia,luckylavish/zamboni,Joergen/zamboni,Jobava/zamboni,atiqueahmedziad/addons-server,Revanth47/addons-server,washort/zamboni,kumar303/zamboni,diox/zamboni,jamesthechamp/zamboni,mdaif/olympia,tsl143/zamboni,ingenioustechie/zamboni,Prashant-Surya/addons-server,Jobava/zamboni,mozilla/addons-server,ddurst/zamboni,andymckay/addons-server,johancz/olympia,Witia1/olympia,aviarypl/mozilla-l10n-addons-server,Nolski/olympia,atiqueahmedziad/addons-server,wagnerand/zamboni,ddurst/zamboni,mstriemer/olympia,clouserw/zamboni,mudithkr/zamboni,eviljeff/zamboni,Jobava/zamboni,mstriemer/zamboni,clouserw/zamboni,mozilla/addons-server,yfdyh000/olympia,mrrrgn/olympia,mdaif/olympia,Joergen/zamboni,tsl143/addons-server,tsl143/addons-server,ngokevin/zamboni,kumar303/olympia,jpetto/olympia,atiqueahmedziad/addons-server,Revanth47/addons-server,jamesthechamp/zamboni,mdaif/olympia,magopian/olympia,muffinresearch/olympia,kumar303/addons-server,magopian/olympia,johancz/olympia,lavish205/olympia,tsl143/addons-server,mudithkr/zamboni,aviarypl/mozilla-l10n-addons-server,ingenioustechie/zamboni,magopian/olympia,andymckay/zamboni,beni55/olympia,ingenioustechie/zamboni,elysium001/zamboni,beni55/olympia,jasonthomas/zamboni,ayushagrawal288/zamboni,Joergen/olympia,muffinresearch/addons-server,diox/zamboni,mrrrgn/olympia,ngokevin/zamboni,elysium001/zamboni,mstriemer/zamboni,aviarypl/mozilla-l10n-addons-server,andymckay/addons-server,mstriemer/addons-server,luckylavish/zamboni,ddurst/zamboni,elysium001/zamboni,Witia1/olympia,clouserw/zamboni,jasonthomas/zamboni,harikishen/addons-server,wagnerand/olympia,eviljeff/olympia,anaran/olympia,mozilla/olympia,johancz/olympia,mstriemer/olympia,diox/zamboni,psiinon/addons-server,mstriemer/addons-server,mrrrgn/olympia,harikishen/addons-server,harry-7/addons-server,kumar303/olympia,wagnerand/addons-server,Joergen/zamboni,mstriemer/zamboni,harry-7/addons-server,bqbn/addons-server,mstriemer/addons-server,Nolski/olympia,muffinresearch/addons-server,Hitechverma/zamboni,andymckay/zamboni,ddurst/zamboni,Prashant-Surya/addons-server,Joergen/olympia,kumar303/addons-server,SuriyaaKudoIsc/olympia,Joergen/olympia,Prashant-Surya/addons-server,diox/olympia,bqbn/addons-server,ayushagrawal288/zamboni,robhudson/zamboni,atiqueahmedziad/addons-server,Jobava/zamboni,Joergen/zamboni,beni55/olympia,washort/zamboni,Hitechverma/zamboni,mstriemer/zamboni,mozilla/zamboni,wagnerand/olympia,anaran/olympia,koehlermichael/olympia,kumar303/addons-server,mozilla/addons-server,robhudson/zamboni,kumar303/zamboni,ngokevin/zamboni,luckylavish/zamboni,kumar303/zamboni,beni55/olympia,crdoconnor/olympia,psiinon/addons-server,muffinresearch/addons-server,mdaif/olympia,jamesthechamp/zamboni,muffinresearch/olympia,andymckay/addons-server,magopian/olympia,wagnerand/addons-server,SuriyaaKudoIsc/olympia,mozilla/olympia,aviarypl/mozilla-l10n-addons-server,yfdyh000/olympia,Hitechverma/zamboni,robhudson/zamboni,psiinon/addons-server,Witia1/olympia,eviljeff/olympia,mozilla/zamboni,mozilla/zamboni,Witia1/olympia,jpetto/olympia,Witia1/olympia,lavish205/olympia,Revanth47/addons-server,mstriemer/addons-server,yfdyh000/olympia,andymckay/olympia,anaran/olympia,shahbaz17/zamboni,andymckay/olympia,kmaglione/olympia,yfdyh000/olympia,Nolski/olympia,muffinresearch/addons-server,elysium001/zamboni,crdoconnor/olympia,harikishen/addons-server,magopian/olympia,harry-7/addons-server,beni55/olympia,eviljeff/zamboni,kmaglione/olympia,eviljeff/olympia,jasonthomas/zamboni,Joergen/olympia