Remove a Persona from the PersonaStore.
See Folks.PersonaStore.remove_persona.
| persona | the persona that should be removed | 
| Folks.PersonaStoreError.STORE_OFFLINE | if the store hasn’t been prepared or has gone offline | 
| Folks.PersonaStoreError.PERMISSION_DENIED | if the store denied permission to delete the contact | 
| Folks.PersonaStoreError.READ_ONLY | if the store is read only | 
| Folks.PersonaStoreError.REMOVE_FAILED | if any other errors happened in the store | 
0.6.0