Deleting a now unneeded variable.

Deleting a now unneeded variable.

We will need this again when one day we make a toggle between
jumping to a directory and searching for a filename fragment,
just like the ^T toggle that exists in the Search / Go-to-line
menus.  But for now, we don't need this.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5745 35c25a1d-7b9e-4130-9fde-d3aeb78583b8