old_contents: class GenericZabbixProviderException(Exception):
      def __init__(self, message=None):
          self.message = "{}: {}".format(type(self).__name__, self.message)
  
      def __unicode__(self):
          return self.message
  
      def __str__(self):
          return self.message
  
      def __repr__(self):
          return self.message
  
  
  class ZabbixProviderCreateException(GenericZabbixProviderException):
      pass
  
  
  class ZabbixProviderDeleteException(GenericZabbixProviderException):
      pass
  
  
  class NotImplementedError(Exception):
      pass
  
new_contents: 
  
  class NotImplementedError(Exception):
      pass
  
subject: remove unused exceptions