Delete Sirius V500 example model

[xresende]

This model is broken. (dont know why). It should be deleted eventually.

@xresende, the model is used in tests.cpp. Should we delete it anyway?

[xresende]

it is still there as an example model on how to create lattice objects, @afonsoharuo . Eventually we should update the lattice version of this example and fix the bug while doing so.

[VitorSouzaLNLS]

@xresende Wouldnt be better to delete SIRIUS V500 from Trackcpp and include a simple FODO in tests.cpp ?