Remove unused app settings

[Desvelao]

Wazuh	Elastic	Rev	Security
4.x	7.x	4xxx	Basic, ODFE, Xpack

Browser
Chrome, Firefox, Safari, etc

Description
There are some settings that were deprecated and they are still appearing in the plugin. They are:

• xpack.rbac.enabled
  • appear in the initial configuration file (wazuh.yml)
• ip.selector
  • appear in the initial configuration file (wazuh.yml)
  • there is some behavior that could be not working or creating a bug: https://github.com/wazuh/wazuh-kibana-app/blob/4.3-7.10/public/components/wz-menu/wz-menu.js#L679. We should test it.
    • if we remove the conditional to get the value of APISelector cookie, we should remove the static method of AppState service. https://github.com/wazuh/wazuh-kibana-app/blob/4.3-7.10/public/react-services/app-state.js#L284-L291

[AlexRuiz7]

The stuff related to the wazuh.yml has been addressed in #4378