A recent refactoring of mail.message induced a crash when redering the front side of an event with messages/notes in its chatter. As there is no use to such a feature, we simply remove the part that displays those messages. Task ID 2279183 Linked to task ID 2071556 (message publish management cleaning) closes odoo/odoo#53135 X-original-commit: c4700d379e3286fb75c0d1f48f67671f841151b7 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>