Removed some unused class members
Added some unused variable overrides to blockette 320. The variables
aren't used directly, but we still need to pull the data from the
stream.
Removed unused import from scanmanager
Reorganized the constructor for BlockLocator. Removed an unused
constructor and class member. Combined two constructor methods into one.
Removed the unused logger member and inaccurate copyright tag.
Removed unused logger in blockettetimestamp
Removed unused logger and PI values from butterworthfilter
Removed unused members in ChannelMeta
Removed unused security classes
Removed Cancel related code. It was not actually used. Removed from
Dataless and the classes themselves.