Drop redundant PrimaryParticleInformation::SetParticle() method
The PrimaryParticleInformation::SetParticle() method is only ever called immediately after the object is created and sets the same GenParticlePtr as was passed in the constructor.
The PrimaryParticleInformation::SetParticle() method is only ever called immediately after the object is created and sets the same GenParticlePtr as was passed in the constructor.