There used to be more, however, removing those effectively more files are scanned so less risk, etc. They would only be removed for a purpose, especially if it meant more files would be scanned as this may have a performance hit, something I would have thought avast wouldn't take lightly as much of what has been done in 4.7 seems to be related to improving performance.
You never know it may be catered for in a way that we can't see or adjust .