Don't remove relays when there are route errors

[codecov[bot]]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (1c43536) 99.73% compared to head (7772ff0) 99.68%. Report is 1 commits behind head on dev.

Files	Patch %	Lines
bellows/uart.py	91.89%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #612 +/- ## ========================================== - Coverage 99.73% 99.68% -0.06% ========================================== Files 74 74 Lines 4987 5014 +27 ========================================== + Hits 4974 4998 +24 - Misses 13 16 +3 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[dmulcahey]

@puddly codecov is drunk on this one