Bug 25301: removed URI parameter "categorycode" from "circulation.tt"

Bug 25301: removed URI parameter "categorycode" from "circulation.tt"

"Edit details" links in patron's circulation check-out page
was sending empty query parameter "categorycode" because there is no
defined template parameter in "circulation.pl"

This patch removes the URI parameter from "circulation.tt" template.

To test:
    1) You need to create or find expired or expiring patron.
    2) Head to patron's circulation check-out page.
    3) Inspect "Edit details" link.
    4) Observe empty parameter "categorycode=" in that link.
    5) Apply patch.
    6) Repeat step 3.
    7) Check that there's no "categorycode=" in the link anymore.

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>