请教一个删除slice某个元素的问题

package main
import "fmt"
func DeleteElementInSlice(s []interface{},index int) []interface{}{
    return append(s[:index],s[index+1:]...)
}
func DeleteOption(oldS []interface{},oldstr interface{})[]interface{}{
    var idx int
    for i,v:=range oldS{
        if v==oldstr{
            idx=i
            break
        }
    }
    s1:=DeleteElementInSlice(oldS,idx)
    return s1
}
func main(){
    slice:=[]interface{}{"tom","hello","ok","love"}
    var str interface{}="hello"

    fmt.Println(DeleteOption(slice,str))

}

这个是泛型的列子，很遗憾go暂时不支持泛型，不考虑性能可以用反射实现，如果对性能敏感，可以使用unsafe包

return呢