Bug 9925 - Remove unused table-pager include

Bug 9925 - Remove unused table-pager include

While the tablesorter plugin has not been completely eliminated from the
staff client yet, there are no more instances where it requires the
include file for showing paging controls. table-pager.inc can be safely
removed.

To test, apply the patch and confirm that the file is gone. A search of
Koha templates for references to table-pager.inc should return no
results.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>