[FIX] Remove unused import, add missing copyright notice

database_cleanup/model/purge_models.py

@@ -1,5 +1,24 @@
 # -*- coding: utf-8 -*-
-import logging
+##############################################################################
+#
+#    OpenERP, Open Source Management Solution
+#    This module copyright (C) 2014 Therp BV (<http://therp.nl>).
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+
 from openerp.osv import orm, fields
 from openerp.tools.translate import _
 from openerp.addons.base.ir.ir_model import MODULE_UNINSTALL_FLAG