Remove orphan PhantomTimeout class

In this release, I deleted the PhantomTimeout class, which was part of my initial implementation for global rule-based test timeout management. During the course of developing this feature, I discovered that I didn't need this bit of byte-code magic, but I failed to remove the class for some reason. I re-discovered this class while searching for Byte Buddy code in need of revisions for compatibility with Java 11+.