1 - Mouse over the name of the offline proxy server in the CAM Status screen. When you do this a trash can icon should appear on the right.
2 - Click on the trash can to remove the proxy from the list.
PLEASE NOTE: If you use a load balance be sure to remove the proxy from it as well to ensure no traffic get forwarded to the old proxy deleted server.
If for some reason resolution 1 is not working, the following steps can be used to remove the proxy host by manually editing your configuration.
It will look something like this:
1 RpstsWsfed 7/22/2016 11:41:57 AM 286
2 RpstsOAuth2 7/22/2016 11:41:45 AM 286
3 RpstsSaml 7/22/2016 11:41:25 AM 286
4 Ui 7/22/2016 11:42:01 AM 98
5 Proxy 5/25/2016 3:50:14 PM 194
6 IpstsSaml 7/22/2016 11:41:26 AM 215
7 Proxy 7/22/2016 11:42:59 AM 407
The Proxy component (ID=5) is the one we're interested in; the other values correspond to the lastTimeOK and runningCfgVersion values for the component in the Database.