“I tried to talk him out of it.”Rep. John E. Bradley called 5th District Appellate Court Justice Bruce D. Stewart — his hometown friend and mentor — after Stewart announced last month he would not run for retention.Bradley said the state’s southernmost appellate court will lose a valuable member when Stewart walks away in December 2016.But Stewart said he’s holding firm to his decision. Although he plans to retire, Stewart hopes he can stick around to help parties settle cases outside of …