可以使用数组的filter方法来过滤出不是红色的食品，最终返回的是一个新的数组。

代码示例：

function filterRedFoods(foods) {
  return foods.filter(function(food) {
    return food.color !== "red";
  });
}

// 示例数据
var foods = [
  { name: "banana", color: "yellow" },
  { name: "apple", color: "red" },
  { name: "grape", color: "purple" },
  { name: "cherry", color: "red" }
];

// 输出原始食品数组，包含红色食品
console.log(foods); // [{ name: "banana", color: "yellow" }, { name: "apple", color: "red" }, { name: "grape", color: "purple" }, { name: "cherry", color: "red" }]

// 调用过滤函数，返回移除后的新食品数组，不包含红色食品
var filteredFoods = filterRedFoods(foods);
console.log(filteredFoods); // [{ name: "banana", color: "yellow" }, { name: "grape", color: "purple" }]

// 输出原始食品数组，不改变原始数组，仍包含红色食品
console.log(foods); // [{ name: "banana", color: "yellow" }, { name: "apple", color: "red" }, { name: "grape", color: "purple" }, { name: "cherry", color: "red" }]