Bug 11748 - Remove unused jquery.uitablefilter.js plugin

Bug 11748 - Remove unused jquery.uitablefilter.js plugin

This patch removes a jQuery plugin which was added for use with the old
tablesorter plugin. Since the tablesorter plugin has been removed and
replaced with DataTables this plugin can also be removed.

To test, apply the patch and search for instances of the plugin:

grep -r -l "jquery.uitablefilter.js" *

There should be no results.

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit 42b71b87cc21ff69072116c7e42b02ad1f85932b)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>