remove useless code

ui/src/flowchartConnectorsDemo.js

@@ -239,30 +239,4 @@
     console.log("in timeout");
     displayGraph()
   }, 500);
-})();
-
-// Dummy code only to show json communication with server
-(function() {
-   function sendData(url, data, onSuccess, onError) {
- 
-    $.ajax({
-        url: url,
-        type: 'POST',
-        data: JSON.stringify(data),
-        contentType: "application/json",
-        //crossDomain: true,
-        success: function(responseJSON) {
-          console.log("got json response",responseJSON);
-        },
-        error: function(xhr, textStatus, errorThrown) {
-          onError(errorThrown);
-        }
-    });
-  }
-//   setTimeout(function () {
-//     console.log("in timeout");
-//     sendData("http://localhost:5000/someTest", {"a": "b"},
-//              function (response) {console.log("ok", response);},
-//              function(foo, bar, baz) {console.log("failure");})
-//   }, 1000);
 })();
\ No newline at end of file