docs: def remove_headers(self, header_name):
  		""" Remove header by its name
  
  		:param header_name: name of header to remove
  		:return: None
  		"""
  		if self.__ro_flag:
  			raise RuntimeError('ro')
  		header_name = self.normalize_name(header_name)
  		if header_name in self.__headers.keys():
  			self.__headers.pop(header_name)