Park Slope Food Coop’s contested vote to boycott Israeli products earlier this week has actually removed Arab-founded products from the shelves, according to one of the business owners impacted. Rachel Simons, the founder and CEO of tahini brand Seed + Mill — one of the products impacted by the boycott — told The Post that the ban also included fellow tahini rival Al Arz, formerly owned by Julia Zaher, an Israeli-Arab.