Bug 13043 - Remove incorrect link to unused DataTables columnFilter plugin on staff...

Bug 13043 - Remove incorrect link to unused DataTables columnFilter plugin on staff client search history page

The staff client search history page does not required the DataTables
columnFilter plugin, so the link (which pointed to the wrong location
anyway) can be removed.

To test, apply the patch and view your search history in the staff
client. Table sorter functions (sorting, paging, and searching) should
work correctly for current and previous sessions of catalog and
authority searches.

Signed-off-by: Frederic Demians <f.demians@tamil.fr>
This patch just affects the staff search history page which is still fully
functionnal after applying the patch.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>