[FIX] project: revert current stage notification

This commit reverts a previous commit which allowed to
display the current stage when the state is changed.

The reverted PR: https://github.com/odoo/odoo/pull/119925

The reversion was done as what was implemented does not
follow the standard display of tracking messages and
because it doesn't look good in the chatter.

Task-3336184

closes odoo/odoo#123797

X-original-commit: eff511140175ba8224c2f9be59a798a3e1dee6da
Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>

addons/project/i18n/project.pot

@@ -1338,14 +1338,6 @@ msgstr ""
 msgid "Currency"
 msgstr ""
 
-#. module: project
-#. odoo-python
-#: code:addons/project/models/project_task.py:0
-#: code:addons/project/models/project_task.py:0
-#, python-format
-msgid "Current Stage: %s"
-msgstr ""
-
 #. module: project
 #: model_terms:ir.ui.view,arch_db:project.portal_tasks_list
 msgid "Current project of the task"

addons/project/models/project_task.py

@@ -1018,16 +1018,6 @@ class Task(models.Model):
                         task.state = '04_waiting_normal'
             if vals['state'] in CLOSED_STATES:
                 task.date_last_stage_update = now
-            if "stage_id" not in vals:
-                if len(self) > 1:
-                    task_ids_per_stage = defaultdict(list)
-                    for task in self:
-                        task_ids_per_stage[task.stage_id].append(task.id)
-                    for stage, task_ids in task_ids_per_stage.items():
-                        tasks = self.browse(task_ids)
-                        tasks._track_set_log_message(_lt("Current Stage: %s", stage.name))
-                else:
-                    self._track_set_log_message(_("Current Stage: %s", self.stage_id.name))
 
         self._task_message_auto_subscribe_notify({task: task.user_ids - old_user_ids[task] - self.env.user for task in self})
         return result