Remove unrar-free helper as no operive change is done

There are signature issues with this old package

helpers/make-unrar-free

-#!/bin/sh
-#
-#    Copyright (C) 2013-2015 Andrew M. Lindley <andrew@andrewlindley.co.uk>
-#
-#    This program is free software; you can redistribute it and/or modify
-#    it under the terms of the GNU General Public License as published by
-#    the Free Software Foundation; either version 2 of the License, or
-#    (at your option) any later version.
-#
-#    This program is distributed in the hope that it will be useful,
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#    GNU General Public License for more details.
-#
-#    You should have received a copy of the GNU General Public License
-#    along with this program; if not, write to the Free Software
-#    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
-#
-
-VERSION=1
-
-. ./config
-
-# Trisquel Issue #7969 - package unrar suggests non-free software
-sed '/only the non-free "unrar" package can do that/s//see package unar for that/;/Conflicts: unrar-nonfree/d' -i debian/control
-
-changelog "FSDG Compliance #7969"
-
-compile
-