user email settings are useless

the /settings/email page shows these toggles:

they affect the receiveAnnouncementEmail and emailNotificationTypes columns in the user table.

There is no code that uses those columns (well, there are two commented-out functions in backend/src/core/NotificationService.ts that do, but again, commented out!)

maybe remove the toggles from the UI?

(thanks to Rire in Discord for noticing)

added bugfrontend label

marked this issue as related to #718

mentioned in commit 8edd002e

mentioned in merge request !850 (merged)

added in review label

assigned to @dakkar

another option would be to replace those settings with different ones and actually honour those. for example, "someone logged in to your account"

mentioned in commit 6c8d1462

closed with commit 8edd002e