Would like to remove that, so users dont neet to select a forum ...and create all new topic in default forum ...which should be selected by default.... but i dont want them to see this field ...

i have found with firebug what code to remove ...

<tr class="ow_alt1">            <td class="ow_label">Forum</td>            <td class="ow_value">                <select name="group" id="input_67584175"><option value="0" disabled="1" class="disabled_option">- General</option><option selected="selected" value="2">Prieteni</option></select>                <span id="input_67584175_error" style="display:none;" class="error"></span>            </td>        </tr>

but when i try to post a new topic i get the error that i need to select a forum ... 

how do i make forum selection by default ?