Update index.rst

source/index.rst

@@ -91,12 +91,6 @@ Our Eco-System
    status.rst
    advanced.rst
    manual/menu_add_ons.rst
-   fail_over/fail_over.rst
-   high_availability/high_availability.rst
-   load_balancing.rst
-   multi_master.rst
-   scalability/scalability.rst
-   tenant_domain_limits.rst
    additional_information.rst
    contributing.rst
    doc_guide.rst