Bug 19669: Remove deprecated checkouts by patron category report

Bug 19669: Remove deprecated checkouts by patron category report

Patch applies. Reports and general OPAC and staff client functionality is intact.
Signed-off-by: Dilan Johnpullé <dilan@calyx.net.au>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit 5ca2b7fedfb13b80b6c453b184474240d4c46a3e)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>