slapos_configurator: do not prevent slapos_category to be updated

otherwise, new categories are not installed

master/bt5/slapos_configurator/SkinTemplateItem/portal_skins/slapos_configurator/TemplateTool_getSlapOSMasterBusinessTemplateList.py

@@ -11,7 +11,6 @@ bt5_installation_list = bt5_update_catalog_list + \
 keep_bt5_id_list = ['erp5_ui_test',
                     'erp5_ui_test_core',
                     'slapos_jio_ui_test',
-                    'slapos_category',
                     # XXX erp5_accounting_l10n_fr should be removed when bug is fixed
                     'erp5_accounting_l10n_fr',
                     'erp5_secure_payment',