[IMP] project: Remove project_color field

Taskid: 3231143
Part-of: odoo/odoo#115155

addons/project/models/project.py

@@ -1199,7 +1199,6 @@ class Task(models.Model):
         'res.company', string='Company', compute='_compute_company_id', store=True, readonly=False,
         required=True, copy=True, default=_default_company_id)
     color = fields.Integer(string='Color Index')
-    project_color = fields.Integer(related='project_id.color', string='Project Color')
     rating_active = fields.Boolean(string='Project Rating Status', related="project_id.rating_active")
     attachment_ids = fields.One2many('ir.attachment', compute='_compute_attachment_ids', string="Main Attachments",
         help="Attachments that don't come from a message.")

addons/project/views/project_views.xml

@@ -1499,11 +1499,11 @@
             <field name="mode">primary</field>
             <field name="arch" type="xml">
                 <xpath expr="//calendar" position="attributes">
-                    <attribute name="color">project_color</attribute>
+                    <attribute name="color">project_id</attribute>
                 </xpath>
                 <xpath expr="//field[@name='project_id']" position="attributes">
                     <attribute name="filters">1</attribute>
-                    <attribute name="color">color</attribute>
+                    <attribute name="color">id</attribute>
                 </xpath>
             </field>
         </record>