Resolve "Remove unused Particle classes"
This MR removes following files:
- BoxParticleCachingPolicy.h
- CellParticleCachingPolicy.h
- GenArrayParticle.h
- GenParticle.h
- IntCIC.h
- IntSUDS.h
- IntTSC.h
- NoParticleCachingPolicy.h
- PAssign.h
- PAssign.hpp
- PAssignDefs.h
- PairBuilder/BasicPairBuilder.h
- PairBuilder/CMakeLists.txt
- PairBuilder/HashPairBuilder.h
- PairBuilder/HashPairBuilderPeriodic.h
- PairBuilder/HashPairBuilderPeriodicParallel.h
- PairBuilder/HashPairBuilderPeriodicParallel_globCHaining.h
- PairBuilder/PairConditions.h
- PairBuilder/SortingPairBuilder.h
- ParticleAttribElem.h
- ParticleCashedLayout.h
- ParticleCashedLayout.hpp
- ParticleInteractAttrib.h
- ParticleInteractAttrib.hpp
- ParticleInteractLayout.h
- ParticleInteractLayout.hpp
- ParticleUniformLayout.h
- ParticleUniformLayout.hpp
Closes #24 (closed)