Example
The delete built-in function removes the element with the specified key from a map.
people := map[string]int{"john": 30, "jane": 29}
fmt.Println(people) // map[john:30 jane:29]
delete(people, "john")
fmt.Println(people) // map[jane:29]
If the map is nil or there is no such element, delete has no effect.
people := map[string]int{"john": 30, "jane": 29}
fmt.Println(people) // map[john:30 jane:29]
delete(people, "notfound")
fmt.Println(people) // map[john:30 jane:29]
var something map[string]int
delete(something, "notfound") // no-op
