Two ways to do this:
1. Using Theme Function
Add following function to your theme's handler qa-theme.php:
function nav_item($key, $navlink, $class, $level=null) {
if ($key != "updates") {
qa_html_theme_base::nav_item($key, $navlink, $class, $level=null);
}
}
OR,
2. Using CSS
Add following class to your theme's stylesheet qa-style.css:
-
display: none;
}