Fresh off of news that California is set to raise the cannabis cultivation tax despite projections of a $31 billion surplus, one marijuana entrepreneur is calling for a potential tax revolt this summer. Michael “Mikey” Steinmetz, co-founder of the company that makes the Flow Kana cannabis brand, is threatening to withhold his taxes unless Gov. Gavin Newsom and the Legislature adjust state marijuana regulations July 1, 2022. He is calling on other CEOs to join…