Bug 35997: Cancelling a hold should remove the hold from the queue

Bug 35997: Cancelling a hold should remove the hold from the queue

Test plan:
1) Place a hold for a record for a patron
2) Build the holds queue
3) Note the holds queue contains a match for that patron and record
4) Cancel the holds queue
5) Reload the holds queue page, note the match for  that patron and
   record is gone!

Signed-off-by: Brendan Lawlor <blawlor@clamsnet.org>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>