Remove obsolete unused class CrossingFramePlaybackInfo

The class CrossingFramePlaybackInfo has not been used for five years.  It was long ago replaced by CrossingFramePlaybackInfoExtended.
I wasted almost a full day of effort because I did not realize that this class had been replaced.  Also, the presence of obsolete classes causes increased memory and disk space usage, as well as extra build time.
Please merge this trivial request.