feat: Drops external connect optimization.

A bosh only optimization which is no longer used and does not bring any significant value when measured.

.eslintignore

@@ -11,6 +11,3 @@ doc/example/libs/*
 # not seem to be a reason why we will want to risk being inconsistent with our
 # remaining JavaScript source code.
 !.eslintrc.js
-
-# Source code written in ES5 which is not processed through Babel.
-connection_optimization/external_connect.js

connection_optimization/external_connect.js

@@ -1,67 +0,0 @@
-/**
- * Requests the given webservice that will create the connection and will return
- * the necessary details(rid, sid and jid) to attach to this connection and
- * start using it. This script can be used for optimizing the connection startup
- * time. The function will send AJAX request to a webservice that should
- * create the bosh session much faster than the client because the webservice
- * can be started on the same machine as the XMPP serever.
- *
- * NOTE: It's vert important to execute this function as early as you can for
- * optimal results.
- *
- * @param webserviceUrl the url for the web service that is going to create the
- * connection.
- * @param successCallback callback function called with the result of the AJAX
- * request if the request was successfull. The callback will receive one
- * parameter which will be JS Object with properties - rid, sid and jid. This
- * result should be passed to JitsiConnection.attach method in order to use that
- * connection.
- * @param error_callback callback function called the AJAX request fail. This
- * callback is going to receive one parameter which is going to be JS error
- * object with a reason for failure in it.
- */
-function createConnectionExternally( // eslint-disable-line no-unused-vars
-        webserviceUrl,
-        successCallback,
-        error_callback) {
-    if (!window.XMLHttpRequest) {
-        error_callback(new Error('XMLHttpRequest is not supported!'));
-        return;
-    }
-
-    var HTTP_STATUS_OK = 200;
-
-    var xhttp = new XMLHttpRequest();
-
-    xhttp.onreadystatechange = function() {
-        if (xhttp.readyState == xhttp.DONE) {
-            var now = window.connectionTimes['external_connect.done']
-                = window.performance.now();
-            console.log('(TIME) external connect XHR done:\t', now);
-            if (xhttp.status == HTTP_STATUS_OK) {
-                try {
-                    var data = JSON.parse(xhttp.responseText);
-                    successCallback(data);
-                } catch (e) {
-                    error_callback(e);
-                }
-            } else {
-                error_callback(new Error('XMLHttpRequest error. Status: '
-                    + xhttp.status + '. Error message: ' + xhttp.statusText));
-            }
-        }
-    };
-
-    xhttp.open('GET', webserviceUrl, true);
-
-    // Fixes external connect for IE
-    // The timeout property may be set only after calling the open() method
-    // and before calling the send() method.
-    xhttp.timeout = 3000;
-
-    window.connectionTimes = {};
-    var now = window.connectionTimes['external_connect.sending']
-        = window.performance.now();
-    console.log('(TIME) Sending external connect XHR:\t', now);
-    xhttp.send();
-}

package.json

@@ -79,7 +79,6 @@
   "files": [
     "dist",
     "types",
-    "connection_optimization/external_connect.js",
     "modules/browser/capabilities.json"
   ],
   "license": "Apache-2.0"