bootstrap: Remove the fast path
bootstrap: Remove the fast path

This is rarely noticed, but when you have old submodules, not updating them will cause you run into https://github.com/rust-lang/cargo/issues/4678.
GBGamer/rust,GBGamer/rust,graydon/rust,graydon/rust,GBGamer/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,GBGamer/rust,aidancully/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,graydon/rust,GBGamer/rust,graydon/rust,GBGamer/rust