These examples were more like manual tests than examples. These
features are now covered and documented in the music player example.
Furthermore, corresponding manual test applications already exist.

Change-Id: I28d857cd704e08a8ef5e6763d6403885119accba
Reviewed-by: Ivan Vizir <define-true-false@yandex.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>