Remove hack that forces dogfood to run on nightly
Remove hack that forces dogfood to run on nightly

This isn't necessary anymore, since we don't use a custom toolchain anymore

graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust