Right now, it's possible for the chain of precheckers:

awaiting integration => awaiting peer review => developer request

to end checking the same issue more than once:

• The user adds the "cime" label.
• The user sends the issue to peer-review or integration.

The same issue is picked twice by the chain above. That has happened, for example, with MDL-43818.

To avoid that we are, simply, going to always clean the "cime" label, no matter the criteria. That way no other prechecker will pick it ever.