[ticket/10734] Removed unwanted span classes

Removed the corner and clear span classes

PHPBB-10734

phpBB/styles/prosilver/template/memberlist_im.html

@@ -6,7 +6,7 @@
 <form method="post" action="{S_IM_ACTION}">
 
 <div class="panel bg2">
-	<div class="inner"><span class="corners-top"><span></span></span>
+	<div class="inner">
 
 	<p>{L_SEND_IM_EXPLAIN}</p>
 
@@ -79,7 +79,7 @@
 	{S_FORM_TOKEN}
 	</fieldset>
 
-	<span class="corners-bottom"><span></span></span></div>
+	</div>
 </div>
 </form>