You can leave the lipped seals out, the O-ring on the bearing seals against the inside of the flange. clean the flange good, scotch-brite it to smooth it too. then put a film of grease on the O-ring and flange before slipping them in. That being said, the inner lipped seals can stay if you don't want to remove them. they won't hurt a thing.
Junk? useable? lots of opinions on that one