Rollover failed with a reconnect after accepting renew offer

[holzeis]

Environment: test
node id: 03b48395a708073df3ece6696af2cde63bd5a39b87d3bc4f197c13dc217482d99e

1. App gets request to rollover
2. App rolls over
3. Coordinator sends the RenewOffer message
4. App accepts the RenewOffer message and transitions to RenewAccepted
5. App disconnects and connects again
6. Upon reconnecting the coordinator identifies that the app is in an intermediate state and rolls back to Established

Found signed channel contract in an intermediate state. Trying to rollback channel to the last stable state!

7. Coordinator again sends a RenewOfferreferring the Established contract.
8. App rejects rollover because it has already accepted the new contract in the RenewOffer.

Now the app is stuck and unable to move forward.

The logic for rolling back is outdated and should be removed as it has been replaced with the retry logic.