Remove incorrect line about aliases in controllers guide (#668)
Remove incorrect line about aliases in controllers guide (#668)

Closes phoenixframework/phoenix_guides#660
Kosmas/phoenix,stevedomin/phoenix,Gazler/phoenix,trarbr/phoenix,eksperimental/phoenix,phoenixframework/phoenix,evax/phoenix,korobkov/phoenix,michalmuskala/phoenix,evax/phoenix,mschae/phoenix,michalmuskala/phoenix,mobileoverlord/phoenix,mitchellhenke/phoenix,0x00evil/phoenix,gjaldon/phoenix,pap/phoenix,dmarkow/phoenix,optikfluffel/phoenix,jwarwick/phoenix,bratsche/phoenix_guides,phoenixframework/phoenix,rafbgarcia/phoenix,mschae/phoenix,stevedomin/phoenix,mitchellhenke/phoenix,trarbr/phoenix,keathley/phoenix,nshafer/phoenix,rafbgarcia/phoenix,nshafer/phoenix,rafbgarcia/phoenix,bsmr-erlang/phoenix,0x00evil/phoenix,bsmr-erlang/phoenix,keathley/phoenix,eksperimental/phoenix,mobileoverlord/phoenix,nshafer/phoenix,optikfluffel/phoenix,pap/phoenix,optikfluffel/phoenix,Joe-noh/phoenix,Gazler/phoenix,Kosmas/phoenix,dmarkow/phoenix,jwarwick/phoenix,phoenixframework/phoenix,0x00evil/phoenix,Joe-noh/phoenix,korobkov/phoenix,gjaldon/phoenix