Excluir elemento do elemento de mapa Go

package main
import ("fmt")

func main() {

  // create a map
  personAge := map[string]int{"Hermione": 21, "Harry": 20, "John": 25}
  fmt.Println("Initial Map: ", personAge)

  // remove element of map with key John
  delete(personAge, "John")

  fmt.Println("Updated Map: ", personAge)
}
SAMER SAEID