Remove "Page Analysis" + "Focus Keyword" functionality from Yoast SEO

functions.php

// Note, I used Timber so my functions.php includes a class that extends TimberSite, but the gist here will be the same;
// add an action that outputs css in the admin to hide some Yoast SEO features.

// in functions.php, add this action:

add_action('admin_head', array($this, 'wpseo_css'));

// Then you need this wpseo_css function in the same class:

    /**
     * This will remove the "Page Analysis" tab from WPSEO + remove the Focus keyword
     */
    public function wpseo_css() {
        echo '<style>

#linkdex {
    display:none;
}

#wpseo_meta .wpseotab.general table.form-table tr:nth-child(2) {
    display:none;
}

</style>';
    }