Improves cache performance by removing version query strings.
function custom_remove_query_strings( $src ) {
$parts = explode( '?ver', $src );
return $parts[0];
}
add_filter( 'script_loader_src', 'custom_remove_query_strings', 15, 1 );
add_filter( 'style_loader_src', 'custom_remove_query_strings', 15, 1 );