code: def remove_blacklisted_directories(self, directories):
          
          directories = util.to_absolute_paths(directories)
          black_dirs = self.blacklisted_directories
          black_dirs = util.remove_from_set(black_dirs, directories)
docs: Attempts to remove the `directories` from the set of blacklisted
          directories. If a particular directory is not found in the set of
          blacklisted, method will continue on silently.
  
          `directories` may be a single instance or an iterable. Recommend
          passing in absolute paths. Method will try to convert to an absolute
          path if it is not already using the current working directory.