maStatusText in HelpTextWindow is dead since

    commit bd3ea40e
    Date:   Fri Jan 21 14:48:58 2011 +0200
Remove ShowHelpStatusText and HideHelpStatusText and associated
cruft

Change-Id: I7a74e2a1b909a479f9338bd4da5fad06ccc25283
Reviewed-on: https://gerrit.libreoffice.org/68153
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>