Nov 22 (Reuters) - Atlanta Federal Reserve President Raphael Bostic said on Monday President Joe Biden"s decision to nominate Jerome Powell for a second term as Fed chair removes uncertainty for policymakers and is a "helpful" development as they approach some critical decisions. "This decision really does take some uncertainty out of the Federal Reserve as an issue, and I think that"s helpful for all of us," Bostic said in an interview on Bloomberg Television. He added that Biden had made a "fine choice" in renominating Powell as well as nominating Governor Lael Brainard to be Fed vice chair, the central bank"s No. 2 leadership role.