[8.0] [REM] mass_editing: Removes hack around ir.model.fields search.

As commented by @StefanRijnhart, this is no longer needed after 4442424:

  > This hack in the model's search method allowed for a domain containing a
    stringified list of ids. It has been obsolete since 4442424, and can
    safely be removed (i.e. remove the whole file).

Closes #638.

mass_editing/models/__init__.py

@@ -20,5 +20,4 @@
 #
 ##############################################################################
 
-from . import ir_model_fields
 from . import mass_object

mass_editing/models/ir_model_fields.py

@@ -1,45 +0,0 @@
-# -*- coding: utf-8 -*-
-##############################################################################
-#
-#    This module uses OpenERP, Open Source Management Solution Framework.
-#    Copyright (C):
-#        2012-Today Serpent Consulting Services (<http://www.serpentcs.com>)
-#
-#    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 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 General Public License for more details.
-#
-#    You should have received a copy of the GNU General Public License
-#    along with this program.  If not, see <http://www.gnu.org/licenses/>
-#
-##############################################################################
-
-from openerp.osv import orm
-
-
-class IrModelFields(orm.Model):
-    _inherit = 'ir.model.fields'
-
-    def search(
-            self, cr, uid, args, offset=0, limit=0, order=None, context=None,
-            count=False):
-        model_domain = []
-        for domain in args:
-            if (len(domain) > 2 and
-                    domain[0] == 'model_id' and
-                    isinstance(domain[2], basestring)):
-                model_domain += [
-                    ('model_id', 'in', map(int, domain[2][1:-1].split(',')))
-                ]
-            else:
-                model_domain.append(domain)
-        return super(IrModelFields, self).search(
-            cr, uid, model_domain, offset=offset, limit=limit, order=order,
-            context=context, count=count
-        )