Remove private methods from TyCtxt impl block: rustc::ty::outlives.
Remove private methods from TyCtxt impl block: rustc::ty::outlives.

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