Can't believe there are still threads about this. It's been said time and time again that the cooling adapter is not needed and in fact advised against in the case of an engine rebuild.
If it makes you feel all warm and fuzzy, leave it on there. If you want to remove it, remove the oil filter, unscrew the filter adapter; remove sandwich adapter, disconnect lines from radiator, done.
...all these threads about turbo savers, in line oil feed filters for turbos, giant oil filters, external transmission filters, etc. #stoptheobsessionplease