从嵌套数组golang mongodb中移除元素

package main

import (
	"fmt"
)

func removeElement(arr [][]int, target int) [][]int {
	result := [][]int{}
	for _, subArr := range arr {
		temp := []int{}
		for _, num := range subArr {
			if num != target {
				temp = append(temp, num)
			}
		}
		if len(temp) > 0 {
			result = append(result, temp)
		}
	}
	return result
}

func main() {
	arr := [][]int{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}}
	target := 5
	result := removeElement(arr, target)
	fmt.Println(result)
}