lints: Promote clippy::print_stderr and clippy::print_stdout
These are available in our MSRV now, so we don't need to handle specially. We can just add them to the standard lint block.
Branch is on top of !1270 (merged) so that CI will pass.
These are available in our MSRV now, so we don't need to handle specially. We can just add them to the standard lint block.
Branch is on top of !1270 (merged) so that CI will pass.