Simple remove duplicates

package main

import "fmt"

func Solve(slice []int) []int {
    lastIndex := make(map[int]int)


    for i, key := range slice {
        lastIndex[key] = i
    }

    result := []int{}


    for i := len(slice) - 1; i >= 0; i-- {
        value := slice[i]

        if lastIndex[value] == i {

            result = append([]int{value}, result...)
        }
    }

    return result
}

func main() {
    numbers := []int{1, 1, 4, 5, 1, 2, 1}

    fmt.Print(Solve(numbers))
}