Problem with Comments Box

The plugin expects webmasters will choose WordPress comments or Facebook comments, not both on the same page.

If you would like to remove the plugin CSS you may dequeue the style after the wp_enqueue_scripts action priority 0.

Your theme or plugin code might look like:

function dequeue_fb_hide_wp_comments() {
	wp_dequeue_style( 'fb_hide_wp_comments' );
}
add_action( 'wp_enqueue_scripts', 'dequeue_fb_hide_wp_comments', 1 );