yeah either remove it all together (pull valve out of rockercover and put a bung in it , cap the nipple on the plenum ) or block the line if it stil has to look legal .
doesnt have to in NZ
all the pvc does is fill your plenum up with oil residue any time you are not on boost
if you have good size lines and it set up like above you will never have smoking issues
atmo venting catch cans are f**kin stupid . they create way more headaches than they solve ( unlless done properly , which 99% arnt )