done delete XHTNLRequest function

src/java-script/hw.js

@@ -88,27 +88,3 @@ form.addEventListener('submit', sendAndCheck);
 (async function checkLoop(delay) {
   setInterval(getMessage, delay);
 })(3000);
-
-function jsonMessageXMLHttpRequest(url, data) {
-  return new Promise((resolve, reject) => {
-    var x = new XMLHttpRequest();
-    x.onerror = () => reject(new Error('jsonPost failed'));
-    //x.setRequestHeader('Content-Type', 'application/json');
-    x.open('POST', url, true);
-    x.send(JSON.stringify(data));
-
-    x.onreadystatechange = () => {
-      if (x.readyState == XMLHttpRequest.DONE && x.status == 200) {
-        resolve(JSON.parse(x.responseText));
-      } else if (x.status != 200) {
-        reject(new Error('status is not 200'));
-      }
-    };
-  });
-}
-
-// jsonMessageXMLHttpRequest('http://students.a-level.com.ua:10012', {
-//   func: 'addMessage',
-//   nick: 'Ado',
-//   message: 'XMLHttpRequest',
-// }).then(data => console.log(data)).catch(e => console.log(e));