Remove suggestion to "you can either configure the User Federation mapping to set the Email Verified attribute to true" in https://access.redhat.com/documentation/en-us/red_hat_3scale_api_management/2.5/html/creating_the_developer_portal/authentication#rhsso

This is currently NOT possible, so we shouldn't suggest it.

However, there is a plan to fix it in a future RH-SSO release so I've also filed https://issues.jboss.org/browse/THREESCALE-3641.