KHARTOUM, Oct 20 (Reuters) - Sudan’s removal from a U.S. list of state sponsors of terrorism will open the door for the African country to get relief of its external debt worth $60 billion, Prime Minister Abdalla Hamdok said on Monday. Hamdok spoke on state television after U.S. President Donald Trump said the United States would remove Sudan from the list, which has been a major hurdle for Sudan to tap international institutions. (Reporting by Khalid Abdelaziz and Alaa Swilam Writing by Ulf Laessing)