rawsession: Only remove sink if it has been added
rawsession: Only remove sink if it has been added

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