executor/mars: allow unregistering runners that were already deleted
If a runner was removed on the gitlab side, we really want the executor to re-register it and not abort because MaRS is afraid of creating multiple tokens.
Fixes: #196 (closed)
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If a runner was removed on the gitlab side, we really want the executor to re-register it and not abort because MaRS is afraid of creating multiple tokens.
Fixes: #196 (closed)