Nonsense.
The Russian crew has various systems aboard for fitting out which must be maintained until the final disposition of the vessel is determined, whether for Russia or otherwise.
The second Mistral class warship must be removed from the drydock to make room for other projects to use the drydock.
Lol..the second Mistral was removed from dry dock as per the schedule to complete its build out, and work on it continues apace.
As for what other projects the French shipyard might have, the only ones I'm aware of are...building more Mistrals for Russia.