[FIX] mass_editing: Allow to remove sidebar action

As 65a1579 did for the creation, this commit does for the unlink,
allowing to non admin users to remove the sidebar action.

mass_editing/models/mass_object.py

@@ -2,7 +2,6 @@
 # © 2016 Serpent Consulting Services Pvt. Ltd. (support@serpentcs.com)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
-from openerp.exceptions import UserError
 from openerp import api, fields, models, _
 
 
@@ -81,14 +80,10 @@ class MassObject(models.Model):
 
     @api.multi
     def unlink_action(self):
-        for mass in self:
-            try:
-                if mass.ref_ir_act_window_id:
-                    mass.ref_ir_act_window_id.unlink()
-                if mass.ref_ir_value_id:
-                    mass.ref_ir_value_id.unlink()
-            except:
-                raise UserError(_("Deletion of the action record failed."))
+        # We make sudo as any user with rights in this model should be able
+        # to delete the action, not only admin
+        self.mapped('ref_ir_act_window_id').sudo().unlink()
+        self.mapped('ref_ir_value_id').sudo().unlink()
         return True
 
     @api.multi