Bug 18079: Holds to pull cleanup

Bug 18079: Holds to pull cleanup

Changes made:

  - remove obsolete comment in pendingreserves.pl
  - use Modern::Perl in circ/pendingreserves.pl
  - get rid of unusable param run_report - followup for bug 8454
  - get rid of references to hold status - followup for bug 9320
  - remove unused data from SQL and reservedata structure

Test plan:
1) Apply patch from bug 18073
2) Apply patch on this bug
3) Enable on shelf hold in administration -> circulation and fines rules
4) Create some holds on avalaible items
5) Confirm that circulation -> holds to pull page works as expected
6) Try to find any regression

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>