Pls modify file single-staff.php line no: 139 from
echo '<h5 class="subheading">' . __('Stay in Touch', 'mo_theme') . '</h5>';
to
if (!empty($twitter) || !empty($googleplus) || !empty($linkedin) || !empty($facebook) || !empty($dribble) || !empty($instagram)){
echo '<h5 class="subheading">' . __('Stay in Touch', 'mo_theme') . '</h5>';
}
Pls use child theme to preserve your changes while updating theme, you can copy the changes to your child theme.
Child theme is included in the downloaded theme bundle.