When a mirrored Replicator Log volume is removed, the following error message may get displayed:

Unable to perform operation as the mirror is either regenerating
or is in failed redundant state.

When you try to remove the mirrored Replicator Log volume you may get the above error if the mirrored volume is still in the process of being synchronized.

Wait till the resynchronization process is completed. You may be able to remove the mirror after the mirrored Replicator Log volumes are synchronized.