removed unused btn from wfs js panel

SE/se-lib/Route/WfsJsRequestPanel.php

@@ -280,7 +280,6 @@ class Route_WfsJsRequestPanel extends RouteBase {
 							UI::h('span', [ 'style' => "margin-right:6px" ], "json tree"),
 						]),
 					]),
-					UI::h('button', [ 'class' => "btn btn-xs btn-default", 'onClick' => "return {$jsFunction['JS_FUNCTION_UPDATE_RESPONSE']}(this)" ], "toggle tree view"),
 				]),
 				UI::h('pre', [ 'id' => 'wfsResponse', 'style' => "margin:0; font-size:x-small; border-radius:0" ], 'loading...'),
 			]);