Bug 11687: remove disused script statecollection.pl

It can be removed.

Test plan:
  git grep statecollection
returns no occurrence.

Signed-off-by: Holger Meissner <h.meissner.82@web.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit b2d08f8359c187f92e1df46ad29b83852fb03079)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>