Disabling white/blacklist prefixes still leaves the functions in place

[bonzi]

Hi.

For my current setup, we require no whitelist/blacklisted prefixes, so they have been removed from the YAML file. This removed the declaration of the variables that store the prefixes, but not the functions that rely on them.

This seems like a large oversight as the code seems to understand not to implement the prefixes if not defined, but hasn't also cleaned up the filter functions that require those variables.

Thanks