[REM] website_blog: remove path field on mail.message

It comes from old age and does not seem used anymore.

addons/website_blog/models/__init__.py

@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from . import mail_message
 from . import website
 from . import website_blog

addons/website_blog/models/mail_message.py

@@ -1,12 +0,0 @@
-# -*- coding: utf-8 -*-
-# Part of Odoo. See LICENSE file for full copyright and licensing details.
-
-from odoo import fields, models
-
-
-class MailMessage(models.Model):
-    _inherit = 'mail.message'
-
-    path = fields.Char(
-        'Discussion Path', index=True,
-        help='Used to display messages in a paragraph-based chatter using a unique path;')

addons/website_blog/models/website_blog.py

@@ -140,7 +140,7 @@ class BlogPost(models.Model):
     teaser = fields.Text('Teaser', compute='_compute_teaser', inverse='_set_teaser')
     teaser_manual = fields.Text(string='Teaser Content')
 
-    website_message_ids = fields.One2many(domain=lambda self: [('model', '=', self._name), ('message_type', '=', 'comment'), ('path', '=', False)])
+    website_message_ids = fields.One2many(domain=lambda self: [('model', '=', self._name), ('message_type', '=', 'comment')])
 
     # creation / update stuff
     create_date = fields.Datetime('Created on', index=True, readonly=True)