ontologies: Drop nmm:videoAlbum

It's an extension to nepomuk, unused, documented as "not making sense",
and the problem highlighted is indeed accurate. Since it's got no use, just
remove it.
3 jobs for wip/carlosg/ontology-minor-updates in 2 minutes and 26 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #672299
test-alpine-edge

00:02:26

passed #672300
test-fedora-latest

00:02:16

passed #672301
test-ubuntu-rolling

00:01:51