Remove cookie by its name

		:param cookie_name: cookie name
		:return:

def remove_cookie(self, cookie_name):
		""" Remove cookie by its name

		:param cookie_name: cookie name
		:return:
		"""
		if self.__ro_flag:
			raise RuntimeError('Read-only cookie-jar changing attempt')
		if cookie_name in self.__cookies.keys():
			self.__cookies.pop(cookie_name)