Removed unused duplicated HTML id on header hidden field

htroot/env/templates/header.template

@@ -21,7 +21,7 @@
         <input type="hidden" name="prefermaskfilter" value="" />
         <input type="hidden" name="nav" value="all" />
     	#(authorized)#::
-  		<input type="hidden" name="auth" id="auth" value=""/>
+  		<input type="hidden" name="auth" value=""/>
   		#(/authorized)#
       </form>
     </div>
@@ -120,7 +120,7 @@
         <li id="header_administration">
           <form action="index.html" method="get">
     		#(authorized)#::
-  				<input type="hidden" name="auth" id="auth" value=""/>
+  				<input type="hidden" name="auth" value=""/>
   			#(/authorized)#
             <button accesskey="s" type="submit" class="btn btn-inverse navbar-btn label-primary" title="Search Interface">
             	<span class="glyphicon glyphicon-search"></span>