Complaints against Willis, citing conflict of interest, won't be heard by ethics watchdog.
Board finds it lacks jurisdiction over Willis due to her role as a state constitutional officer.
Steven Kramer and Gregory Mantell filed complaints, alleging improper benefits and ethics violations.
National attention drawn to Willis's case, with Rep. Marjorie Taylor Greene among those cheering on the inquiry.
Georgia state Senate committee also probes allegations of taxpayer fund misuse by Willis.
Judge expected to rule on disqualification of Willis and her office from historic prosecution by next week.
If disqualified, a local council may select a different district attorney's office for the case.