Remove TraitRefHackInner and use the concatenating functionality instead of trait_ref_hack
Remove TraitRefHackInner and use the concatenating functionality instead of trait_ref_hack

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