By Alistair Smout and Michael Holden LONDON (Reuters) -British Prime Minister Rishi Sunak set out draft emergency legislation on Wednesday which he said would pave the way for asylum seekers to be deported to Rwanda, but immediately suffered a major setback when his immigration minister quit. The “Safety of Rwanda Bill”, published the day after Britain signed a new treaty with Rwanda, is designed to overcome a ruling by the UK Supreme Court that the government’s proposed scheme to send thousands of asylum seekers to the East African country was unlawful. The government said the bill was “the t…