TrackMate moved to its repository.

We delete left overs now.
Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>
MaMuT_: acquaint recent changes in TrackMate v2.2.0-SNAPSHOT

Signed-off-by: Jean-Yves Tinevez <jean-yves.tinevez@pasteur.fr>