Revert "Let pom-fiji manages the TrackMate version."

This reverts commit 9375bc07ca6b6df71c6eda08c5404e4b1235caac.
Right now, let's wait for us to release v2.4.1.
Removed unused methods.

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