add delete particles for GUARD

- add new function to delete particles in GUARD where no neighbor is connected
- delete GUARD particles in TaskParticlesSendelete GUARD particles in TaskParticlesSendd
rename deleteParticles()

rename deleteParticles() to deleteGuardParticles()
Merge pull request #363 from psychocoderHPC/topic-freeGuardFrames

delete particle frames in GUARD