Remove reference to (BETA) in test comments

test/setup.js

@@ -53,7 +53,7 @@ function waitForLoad (app, t, opts) {
   }).then(function () {
     return app.webContents.getTitle()
   }).then(function (title) {
-    // Note the window title is WebTorrent (BETA), this is the HTML <title>
+    // Note the window title is WebTorrent, this is the HTML <title>
     t.equal(title, 'Main Window', 'html title')
   })
 }