Bug 26262: Remove wrong dom setting in course reserves (OPAC)

Bug 26262: Remove wrong dom setting in course reserves (OPAC)

The current setting required pagination to be displayed. This was hidden
probably as a side effect of styling settings. But the docs are clear on
the fact that p and l are intended for displaying pagination controls
and table rows lenght information [1]

As the course reserves datatable is not paginated, this needs to be
fixed properly by removing those controls in the configuration. This
patch does so.

To test:
1. Have some course reserves
2. See them in the OPAC
=> FAIL: Some funky, misaligned pagination artifacts are displayed
3. Apply this patch and reload
=> SUCCESS: Things are back to normal!
4. Sign off :-D

[1] https://datatables.net/examples/basic_init/dom.html

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>