Remove unused Phys/DaVinciMCTools/src/MCReconstructed tool

@amathad and @pkoppenb, following the discussion at #43 (closed) I found yet another "object" that has the same name as others, namely this tool MCReconstructed (not to be confused with the helper class of the same name), which happens to be written in legacy style and unused. Removing. We of course have the MCReconstructedAlg algorithm, which in fact seems to use the same interface.

[There may be more clean-ups possible but this seems scoped enough for a MR.]