Remove sha check and version from FirefoxAurora
Remove sha check and version from FirefoxAurora

Sha is likely to change without notice even for the same dmg filename (was currently broken because of this)
elovelan/homebrew-versions,noamross/homebrew-versions,bimmlerd/homebrew-versions,coeligena/homebrew-verscustomized,rkJun/homebrew-versions,kstarsinic/homebrew-versions,zsjohny/homebrew-versions,nicday/homebrew-versions,zchee/homebrew-versions,lukasbestle/homebrew-versions,chadcatlett/caskroom-homebrew-versions,adjohnson916/homebrew-versions,n8henrie/homebrew-versions,lukaselmer/homebrew-versions,deizel/homebrew-versions,dictcp/homebrew-versions,visualphoenix/homebrew-versions,invl/homebrew-versions,pquentin/homebrew-versions,3van/homebrew-versions,tomschlick/homebrew-versions,onewheelskyward/homebrew-versions