Checkmk Werk 7940: Removed deprecated host/service visibility handling for webservices

ID: 7940 Title: Removed deprecated host/service visibility handling for webservices Component: WATO Level: 1 Class: New feature Version: 1.7.0i1 Werk #3376 deprecated the user attribute {{Visibility of Hosts/Services (Webservice)}} and offered a better alternative via the <tt>force_authuser</tt> URL variable. This deprecation has been in effect since 1.4.0, so we can finally remove that attribute.