remove duplicate: loop

main.go

func removeDuplicateLoop(arr []int) []int {
	p := append([]int{}, arr...)
	for i := range p {
		for j := i + 1; j < len(p); j++ {
			if p[i] == p[j] {
				p = append(p[:j], p[j+1:]...)
				j--
			}
		}
	}
	return p
}