Bug 17831: Remove non-existig bibliosubject.subject mapping from frameworks

Bug 17831: Remove non-existig bibliosubject.subject mapping from frameworks

This patch removes the assignment of non-existent koha field
'bibliosubject.subject' to MARC subject fields in the installer data
for koha

To test:
You'll want a new fresh db

1 - Apply patch
2 - Run websintaller
3 - Ensure that thigns go smoothly
4 - Add/delete/edit some records and ensure that things are working with
the installed frameworks

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>