[IMP] crm, mass_mailing_crm : remove useless override of message_get_default_recipients

As CRM inherits directly of blacklist mixin, no need to re-override
the message_get_default_recipients in the bridge module.
This code was even not in the good place.

Anyway, email_normalized can be directly used in the
message_get_default_recipients override in crm module itself.

Task ID : 1915317
Related Task ID : 1896677

Closes PR #29261

addons/crm/models/crm_lead.py

@@ -1161,7 +1161,7 @@ class Lead(models.Model):
     def message_get_default_recipients(self):
         return {
             r.id : {'partner_ids': [],
-                    'email_to': r.email_from,
+                    'email_to': r.email_normalized,
                     'email_cc': False}
             for r in self.sudo()
         }

addons/mass_mailing_crm/models/__init__.py

@@ -2,4 +2,3 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 from . import mass_mailing
-from . import crm_lead

addons/mass_mailing_crm/models/crm_lead.py

@@ -1,18 +0,0 @@
-# -*- coding: utf-8 -*-
-# Part of Odoo. See LICENSE file for full copyright and licensing details.
-
-from odoo import api, models
-
-
-class Lead(models.Model):
-    _name = "crm.lead"
-    _inherit = ['crm.lead']
-
-    @api.multi
-    def message_get_default_recipients(self):
-        return {
-            r.id : {'partner_ids': [],
-                    'email_to': r.email_normalized,
-                    'email_cc': False}
-            for r in self.sudo()
-        }