Bug 13138: Remove jQuery plugins which were used by Solr

Bug 13138: Remove jQuery plugins which were used by Solr

This patch removes two jQuery plugins which were used only by
Solr-related templates. With the removal of Solr these plugins are
obsolete.

To test, search the Koha code for references to the two plugins:

jquery.textarea-expander.js
tablednd.js

There should be none.

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Couldn't find any references. Also passes tests and QA script.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>