Steps for 11.0 migration

We are going straight to 12.0, but this commit includes the changes for
the 11.0 accorging to the wiki [1]

[1] https://github.com/OCA/maintainer-tools/wiki/Migration-to-version-11.0

mail_check_mailbox_size/__init__.py

@@ -1,3 +1 @@
-# -*- coding: utf-8 -*-
-
 from . import models

mail_check_mailbox_size/__manifest__.py

@@ -1,11 +1,10 @@
-# -*- coding: utf-8 -*-
 # Copyright 2018 Lorenzo Battistini
 # License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl).
 
 {
     "name": "Check mailbox size",
     "summary": "Send an email summarizing the current space used by a mailbox",
-    "version": "10.0.1.0.0",
+    "version": "11.0.1.0.0",
     "development_status": "Beta",
     "website": "https://github.com/OCA/social",
     "author": "Agile Business Group, Odoo Community Association (OCA)",

mail_check_mailbox_size/data/cron_data.xml

@@ -7,9 +7,8 @@
             <field name="interval_type">days</field>
             <field name="numbercall">-1</field>
             <field name="doall" eval="False"/>
-            <field name="model">fetchmail.server</field>
-            <field name="function">_check_mailboxes_size_cron</field>
-            <field name="args">()</field>
+            <field name="model_id" ref="fetchmail.model_fetchmail_server"/>
+            <field name="code">model._check_mailboxes_size_cron()</field>
             <!-- Active flag is set on fetchmail_server.create/write -->
             <field name="active" eval="False"/>
         </record>

mail_check_mailbox_size/models/__init__.py

@@ -1,3 +1 @@
-# -*- coding: utf-8 -*-
-
 from . import fetchmail

mail_check_mailbox_size/models/fetchmail.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 import logging
 from odoo import models, fields, api, _