To clarify, the only way to actually remove the SMS reminder is to have either an authenticator or SMS enabled. It is however possible to prevent the reminder from ever showing for those that want to stick with email authentication, which is funnily the more secure option. actually get rid of sms reminder is allow sms or authenticator, log in the game using this and then disable it again, this will turn off reminder notification for some time, i have one account, where i never have this reminder again, and have 3 other, where this pop up after some time, like once per 3-4 month or so, so i have no idea what start it