Keyshare account is not deleted when doing a KeyshareRemove in irmaclient

[ivard]

Expected behaviour:

When doing a KeyshareRemove, KeyshareRemoveAll or RemoveScheme in irmaclient, we expect that the keyshare account will also be deleted in the keyshare server. This is an explicit action by the user, so we can follow the same process here as when deleting the account using MyIRMA/MyYivi (i.e. block the account, send a notification email and delete all data after a 14 day delay).

Current behaviour:

Nothing is deleted immediately, because the keyshare server has no endpoint for irmaclient to initiate this action. The account is only deleted after 365 days now, or when the user explicitly requests this via MyYivi.