Wordpress: Hide yoast seo settngs on user profile https://lubus.in/blog/wordpress-yoast-seo-hide-settings-user-profile-page-19

admin.css

.yoast-settings {
     display: none;
}

enqueue-functions.php

<?
// Register Style
function lubus_admin_style() {
	wp_register_style( 'admin-style', get_template_directory_uri() .'/admin.css', false, '1.0' );
	wp_enqueue_style( 'admin-style' );
}

// Hook into the 'admin_enqueue_scripts' action
add_action( 'admin_enqueue_scripts', 'lubus_admin_style' );
?>

inline-functions.php

add_action('admin_head', 'lubus_hide_yoast_profile');

function lubus_hide_yoast_profile() {
  echo '<style>
          .yoast-settings {
               display: none;
          }
        </style>';
}

how to implement into existing files? :/