By Julia Edwards Ainsley and Dan Levine WASHINGTON/SAN FRANCISCO, Jan 30 (Reuters) - U.S. President Donald Trump fired the federal government's top lawyer Sally Yates on Monday after she took the extraordinarily rare step of defying the White House and saying the Justice Department would not defend his new travel restrictions targeting seven Muslim-majority nations. The White House said on Twitter that Dana Boente, U.S. Attorney for the Eastern District of Virginia, would replace Yates, an appointee of former Democratic President Barack Obama, as acting U.S. attorney general. Yates on Monday told Justice Department lawyers in a letter that they would not defend in court Trump's directive that put a 120-day hold on allowing refugees into the country, an indefinite ban on refugees from Syria and a 90-day bar on citizens from Iran, Iraq, Libya, Somalia, Sudan, Syria and Yemen. Yates said she did not believe defending the order would be "consistent with this instituti...