Vincent Llorens 7fc4a13865 RPM: don't output errors on uninstallation
As per RPM documentation, it is advised to not clutter the output
when removing packages.

This commit fixes this by redirecting the errors to /dev/null,
effectively getting rid of errors like:
```
userdel: synergy mail spool (/var/spool/mail/synergy) not found
userdel: synergy home directory (/home/synergy) not found
groupdel: group 'synergy' does not exist
```

Change-Id: I41508c13e971b3740d3e37448b62d5a9b841db37
2016-10-04 16:59:30 +02:00
..