remove_action() not working in page template – Genesis

Page templates are called too late to effect actions. You can achieve what you need another way, by targeting this in your functions, with a test for the page template, like this:

function twl_content_wrap_start() {
    if ( !is_page_template( "page_full-width.php" ) )
        return '<div class="container">';
}

BTW, as a rule of thumb, actions generally don’t echo, they should return (although it does depend on the action).