WT3C Code at the bottom – function.php

Hi there,

I´ve got just a little question and I know it´s not a theme-thing, but maybe … :)

I´m using the WT3C Cache and everything is working fine.
The only thing I don´t like is the code at the bottom of each side:

<!-- Performance optimized by W3 Total Cache. Learn more: http://www.w3-edge.com/wordpress-plugins/
Minified using disk
Page Caching using disk: enhanced (User is logged in)
Object Caching 4003/4518 objects using disk
 -->

I´ve disabled that with the following comment in the function.php of my Enfold Child:
add_filter( 'w3tc_can_print_comment', function( $w3tc_setting ) { return false; }, 10, 1 );

That´s working with two languages, when I´ve got the second language in a different folder (e.g. /en).
But when I change that to an own domain (WPML), I´ve got the error:
Parse error: syntax error, unexpected T_FUNCTION in /wp-content/themes/enfold-child/functions.php on line 32

When I comment out the line, everything is fine but I´ve got the W3TC-Code …

Have you got an idea? If not, no problem! I know with the theme is everything fine!!!
Thank you & best regards!
Ela