Previously, the debug manager was rewritten with the new webclient architecture, however, because the frontend did not have access to the new infrastructure (env and services), the old debug manager was kept and used only in the frontend. Since odoo/odoo#72675 the new env and services are now available, this commit simply uses the new debug manager in the frontend and removes the legacy code. closes odoo/odoo#74609 Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>