Instacart and Whole Foods are making their breakup official. And they're already moving on to other relationships and dividing their assets.
Starting Dec. 14, the San Francisco delivery service will begin to dissolve one of the oldest relationships in the six-year-old company's history. Soon Instacart customers will no longer be able place app or online orders with Whole Foods. More than 1,400 part-time workers Instacart has placed in 76 Whole Foods locations across the country will either get…