removed the `channel` property from the template audio definition (not used anymore)
removed the `channel` property from the template audio definition (not used anymore)

wellesleywatson/info3180-lab4,blipjoy/boilerplate,cdwuestner/capstone,jjhanso/aub-game-tutorial,aziegler/boilerplate,dziga/buz,aziegler/ggj16Lille,yahsharahla/info3180-lab4,melonjs/boilerplate,yahsharahla/info3180-lab4,blipjoy/boilerplate,wellesleywatson/info3180-lab4,aziegler/ggj16Lille,cdwuestner/capstone,whitef0x0/Necromunda,melonjs/boilerplate,jjhanso/aub-game-tutorial,dziga/buz,philipcressler/personal-game,aziegler/boilerplate,Samorae-Campbell/info3180-lab4,sportanova/space_site,Samorae-Campbell/info3180-lab4,whitef0x0/Necromunda,philipcressler/personal-game