f4bef2e41c
Revert "Implement [OsStr]::join", which was merged without FCP. This reverts commit 4fcbc53820ab423bbeb41f07822369aa05da1d68, see https://github.com/rust-lang/rust/pull/96744. (I'm terribly sorry, and truly don't remember r+ing it, or even having seen it before yesterday, which is... genuinely very worrisome for me). r? `@m-ou-se`