code: def songs_delete(self, songs):
  		
  
  		mutations = [mc_calls.TrackBatch.delete(song['id']) for song in songs]
  		response = self._call(
  			mc_calls.TrackBatch,
  			mutations
  		)
  
  		success_ids = [
  			res['id']
  			for res in response.body['mutate_response']
  			if res['response_code'] == 'OK'
  		]
  
  		# TODO: Report failures.
  		# failure_ids = [
  		# 	res['id']
  		# 	for res in response.body['mutate_response']
  		# 	if res['response_code'] != 'OK'
  		# ]
  
  		return success_ids
docs: Delete songs from library.
  
  		Parameters:
  			song (list): A list of song dicts.
  
  		Returns:
  			list: Successfully deleted song IDs.