[ticket/10734] Removed unwanted span classes

Removed the corner and clear span classes

PHPBB-10734

phpBB/styles/prosilver/template/posting_attach_body.html

@@ -1,5 +1,5 @@
 <div class="panel bg3" id="attach-panel">
-	<div class="inner"><span class="corners-top"><span></span></span>
+	<div class="inner">
 
 	<p>{L_ADD_ATTACHMENT_EXPLAIN}</p>
 	
@@ -17,5 +17,5 @@
 	</dl>
 	</fieldset>
 
-	<span class="corners-bottom"><span></span></span></div>
+	</div>
 </div>