This method does not need to be either safe or idempotent. Operations requested through DELETE can have side effects
 for which users can be held accountable. When using this method, it may be useful to save a copy of the affected URL
 in temporary storage.

 <p>
 If the HTTP DELETE request is incorrectly formatted, <code>doDelete</code> returns an HTTP "Bad Request" message.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>req</code> - the <a href="../../../jakarta/servlet/http/Htt