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 thatīs 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 ACLīs from the datas.
Good Luck