New clippy fixes

2 jobs for master in 6 minutes and 34 seconds (queued for 2 seconds)
Status Name Job ID Coverage
failed test #2368


skipped build #2369
Name Stage Failure
test Test
For more information about this error, try `rustc --explain E0602`.
error: could not compile `iron-sessionstorage`

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: build failed
make: *** [Makefile:23: clippy] Error 101
Cleaning up file based variables
ERROR: Job failed: exit code 1