Resetting errors on EpicsMotor devices doesn't always work
We have some logic in the doReset of EpicsMotor that makes it issue a warning and refuse to reset if the 'errorbitpv' is not set. However, the errorbitpv is not always set when there is an error that can be resolved with a reset. So this logic prevents legitimate reset attempts. This has caused problems for users trying to reset motors after minor issues.
Since the IOC will not reset errors that cannot be reset, there is no benefit to keeping this condition.
It should be removed.