I think the removal of Bergoglio may be provoked by the Synod. But it wouldn’t be the laypeople; there’d have to be enough heirarchs to decide that the process was invalid (which it was, all the way from Bergoglio’s maneuvering with his “mafia” to the fact that an extra blank ballot turned up in the urn on the first vote when the vote went to somebody other than Bergoglio, thus making that first vote be thrown out).
Or maybe just some bureaucrat who knows the ins and outs and decides to blow the whistle...
In any case, I think we’d be in a situation of sede vacante, unless BXVI stepped forward to resume the crown (which I don’t think he would - also, he’s very frail, uses a walker and is practically under house arrest). So then the question would be who could convene the conclave and who could vote.
Thanks for the insight to an existing process.