// option. This file may not be copied, modified, or distributed
// except according to those terms.
-
-#![feature(tool_lints)]
-
#![warn(clippy::default_hash_types)]
#![feature(rustc_private)]
extern crate rustc_data_structures;
-use std::collections::{HashMap, HashSet};
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
+use std::collections::{HashMap, HashSet};
fn main() {
let _map: HashMap<String, String> = HashMap::default();