Remove a second set of deprecated functions

This check-in also tidies up the test files across the entire repo, as there
were some issues from the previous removal and I think from Bruno's change to
l3prop.


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4420 de43f980-851b-0410-b2f7-c40aca1f87e0