On the campaign trail and in his first weeks in office, Gov. Bruce Rauner pledged to save taxpayers money by eliminating some of Illinois’ nearly 7,000 units of government — a piece of his legislative agenda with rare bipartisan support.Now a task force the Republican governor named to put that idea in motion is preparing to present its final recommendations. Lt. Gov. Evelyn Sanguinetti, the commission’s chairwoman, said its suggestions could make government more efficient and effective if the legislature …