proposer field is false though it's the only sequencer

[omritoptix]

[zale144]

the Proposer field is now deprecated and is never set to true. The only reason it's not deleted is because it is referenced in the v4 upgrade handler. Can we still remove the field @mtsitrin ?

[mtsitrin]

@omritoptix this field is deprecated. it's not used anywhere but the migration handler to v4

[zale144]

I suppose it's important how it's used:

if oldSequencer.Proposer {
	sequencerkeeper.SetProposer(ctx, oldSequencer.RollappId, oldSequencer.Address)
}

so, I think we're not in a hurry to remove it, we can leave it until running V4 upgrade on mainnet