Japan's 'Monster' Inoue ready to rampage through super-bantamweight division

He said he had already decided to vacate his titles …

Good move financially. He relinquishes the exorbitant sanctioning fees on each of those four belts.

Mayweather spoke about how all those sanctioning bodies are bleeding the boxers and watering down the sport: https://youtu.be/cytNPt91_2I

The sanctioning bodies, promoters and boxers ducking each other in their prime is why the sport is a shell of its former self.