Don't check whether a 3pid is allowed to register during password reset
Don't check whether a 3pid is allowed to register during password reset

This endpoint should only deal with emails that have already been approved, and
are attached with user's account. There's no need to re-check them here.

matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse