History of unlink 1 change

In crates/hub/src/signin.rs, lines 271–278 on d3b048b27277329d343d78bf508f6ac4c04766e8ef9ae64c13cdce55571a0397. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 271,278:crates/hub/src/signin.rs.