How to ignore wp_link_pages function?

wp_link_pages has two filters you can use:

• The wp_link_pages_args filter is passed the $args for wp_link_pages so you could set echo to false.

• The wp_link_pages filter is passed the output so you could set the output to nil. Something like this should work:

/**
 * Filter the HTML output of page links for paginated posts.
 *
 * @param  string $output HTML output of paginated posts' page links.
 * @param  array  $args   An array of arguments.
 * @return string $output HTML output of paginated posts' page links.
 **/
add_filter('wp_link_pages', 'wpse_218590_hide_wp_link_pages', 10, 2);
function wpse_218590_hide_wp_link_pages( $output, $args )
{
    return '';
}

This isn’t tested and I only had a quick look at the filters so it may not be 100% correct but it should give you an idea of what to do