(a) A county auditor may be removed from office and a successor appointed if, after due investigation by the district judges who appointed the auditor, it is proven that the auditor:
(1) has committed official misconduct; or
(2) is incompetent to faithfully discharge the duties of the office of county auditor.
(b) The district judges who appointed a county auditor under Section 84.002(b)(2) or Section 84.008 may discontinue the services of the auditor after the expiration of one year after the date of the appointment if it is clearly shown that the auditor is not necessary and the auditor's services are not commensurate with the auditor's salary.