Republican lawmakers reined in regulations — including some on testing — that they criticized as heavy-handed.With all the attention paid to President Trump’s lightning-rod secretary of education, Betsy DeVos, and her advocacy for private school vouchers, little public notice has been paid to the action on education in Congress — where lawmakers have broader power than Ms. DeVos to make changes to the nation’s school system.Now, Congress has done exactly that, voting to repeal crucial regulations associated with the Every Student Succeeds Act, one of President Barack Obama’s final legislative achievements.