graphics/{,py-}opencolorio{,-tools}: fix plist in py- port after update to 2.3.2

While here pet portclippy and remove unnecessary dependencies.

PR: 275402 275494
Reported by: antoine
Approved by: portmgr (blanket, fix build)
Fixes: 3e51c20bc069 (graphics/{,py-}opencolorio{,-tools}: Udpate to 2.3.2)