In odoo v10, use_tasks boolean field is used to AccountAnalyticAccount class file but removed that field to AccountAnalyticAccount class file.(odoo v11)

Let me know why removed use_tasks boolean field in odoo v11.

Code V10:

class AccountAnalyticAccount(models.Model):

    _inherit = 'account.analytic.account'

    _description = 'Analytic Account'

    use_tasks = fields.Boolean(string='Use Tasks', help="Check this box to manage internal activities through this project")

    company_uom_id = fields.Many2one('product.uom', related='company_id.project_time_mode_id', string="Company UOM")

    project_ids = fields.One2many('project.project', 'analytic_account_id', string='Projects')

    project_count = fields.Integer(compute='_compute_project_count', string='Project Count')

Code v11:

class AccountAnalyticAccount(models.Model):

    _inherit = 'account.analytic.account'

    _description = 'Analytic Account'

    company_uom_id = fields.Many2one('product.uom', related='company_id.project_time_mode_id', string="Company UOM")

    project_ids = fields.One2many('project.project', 'analytic_account_id', string='Projects')

    project_count = fields.Integer(compute='_compute_project_count', string='Project Count')