Removed hac from devel

Removed HAC from devel. This also meant removing

• HER2
• all the hac hyperopts and performance tests
• hac from smoke tests
• hac from the readme
• HierarchicalEvalCallback
• convert_alg_cfg(cfg)
• **alg_kwargs
• the common folder in custom_algorithms as it was only used by hac
• the if clause when recording that was only for hac

I kept SACVG. HAC is still available on the hac branch.