li.woocommerce-MyAccount-navigation-link.woocommerce-MyAccount-navigation-link--my-membership-notes {
    display: none;
}

li.woocommerce-MyAccount-navigation-link.woocommerce-MyAccount-navigation-link--my-membership-discounts {
    display: none;
}

li.woocommerce-MyAccount-navigation-link.woocommerce-MyAccount-navigation-link--my-membership-products {
    display: none;
}