remove other router reference from channel testing guide
remove other router reference from channel testing guide

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