I have found a way to remove CWP without a reinstall of centos.
In my case, I had installed the CWP for RHEL6 but I have RHEL7 and that´s the way:
- remove the repositorys (rpm packages) with rpm -qa you find the right ones
- to delete the cwpsrv directory u had to change the ACL´s from the datas.
Good Luck
Wow, that's great. Will surely try it. ;) :D