rtpsession: Remove nasty dispose in other thread trick
rtpsession: Remove nasty dispose in other thread trick

tieto/farstream,tieto/farstream,tieto/farstream,shadeslayer/farstream,kakaroto/farstream,pexip/farstream,pexip/farstream,shadeslayer/farstream,shadeslayer/farstream,shadeslayer/farstream,tieto/farstream,tieto/farstream,kakaroto/farstream,kakaroto/farstream,pexip/farstream,kakaroto/farstream,pexip/farstream