Remove check for high user logins
Remove check for high user logins

This check was added a long time ago, and it's not clear why. Removing
as there doesn't seem to be any value in having it.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet