[IMP] project: Remove kanban_state help

Purpose
=======

It makes it more complex than what it is.

addons/project/models/project.py

@@ -398,11 +398,7 @@ class Task(models.Model):
         ('normal', 'Grey'),
         ('done', 'Green'),
         ('blocked', 'Red')], string='Kanban State',
-        copy=False, default='normal', required=True,
-        help="A task's kanban state indicates special situations affecting it:\n"
-             " * Grey is the default situation\n"
-             " * Red indicates something is preventing the progress of this task\n"
-             " * Green indicates the task is ready to be pulled to the next stage")
+        copy=False, default='normal', required=True)
     kanban_state_label = fields.Char(compute='_compute_kanban_state_label', string='Kanban State', track_visibility='onchange')
     create_date = fields.Datetime(index=True)
     write_date = fields.Datetime(index=True)  #not displayed in the view but it might be useful with base_automation module (and it needs to be defined first for that)