Benjamin Hipple 05343f6ff1 rust: remove legacy cargo fetcher
We have now migrated every single Rust package in NixPkgs! This deletes the
legacy fetcher, which is now unused.

Resolves #79975
2020-03-18 20:12:32 -07:00
..
2020-02-16 09:49:12 -08:00
2019-09-18 22:12:54 +02:00
2019-01-08 15:08:42 +00:00