The XmlHttpRequest example contains a lot of unnecessary code, and I
felt that most of it could just be removed.
The point of the example project is to showcase how to use the
XMLHttpRequest javascript object to make requests.
Which is why I felt that we could remove any outside dependencies for
the project (like the LauncherList from the 'quick/shared' directory),
and reduce the amount of components down to the minimum.
Fixes: QTBUG-95734
Pick-to: 6.2
Change-Id: I9b062f4d7e942db4a2669a8c65f7488aa4a54740
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>