this is the only part that should be removed, make sire you did not delete the closing tag above.
also remember to change this also in item-edit.php
<div class="box location">
<h2><?php _e('Lokacija', 'modern'); ?></h2>
<div class="row">
<label for="countryId"><?php _e('Država', 'modern'); ?></label>
<?php ItemForm::country_select(osc_get_countries(), osc_user()); ?>
</div>
<div class="row">
<label for="regionId"><?php _e('Mjesto', 'modern'); ?></label>
<?php ItemForm::region_text(osc_user()); ?>
</div>
</div>