Remove woo framework, canvas theme & Revolution slider meta generator from site

remove_revslider_meta_generator.php

<?php 

function remove_revslider_meta_tag() {
    return '';
}
add_filter( 'revslider_meta_generator', 'remove_revslider_meta_tag' );

?>

remove_woo_canvas_meta.php

<?php 
// Remove the WooThemes version from the html headers
function no_woo_version ()
{
   return true;
}
add_filter ('wf_disable_generator_tags', 'no_woo_version');


?>