This commit will clean the code by removing the field 'color' from model 'event.event' since the field is not used/needed anymore. Task ID 2243918 closes odoo/odoo#50155 Related: odoo/upgrade#1124 Related: odoo/enterprise#10199 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>