The civil service commission, if existing, shall hear and decide appeals from any disciplinary action, suspension, or removal of county employees who are within the classified service, and shall perform no other function. The commission in exercising its duties shall be authorized to employ such secretarial and clerical assistance as may be approved by the board of county commissioners. All other personnel and employee relations functions of the county shall be performed by the department of personnel and employee relations, the county manager or elected county executive and the board of county commissioners. The civil service commission shall have no authority over the performance of such functions.