code: def remove_for_target(self, target, products):
      
      for product in products:
        self._products_by_target[target].discard(product)
docs: Updates the products for a particular target, removing the given existing entries.
  
      :API: public
  
      :param target: The target to remove the products for.
      :param products: A list of tuples (conf, path) to remove.