<?php
remove_action('wp_head', 'wp_generator');
remove_action('wp_head', 'wlwmanifest_link');
remove_action('wp_head', 'rsd_link');
add_filter('the_generator', '__return_empty_string');
function rem_wp_ver_css_js( $src ) {
    if ( strpos( $src, 'ver=' ) )
        $src = remove_query_arg( 'ver', $src );
    return $src;
}
add_filter( 'style_loader_src', 'rem_wp_ver_css_js', 9999 );
add_filter( 'script_loader_src', 'rem_wp_ver_css_js', 9999 );

?>