fix(demo): unused_imports

Signed-off-by: Martin Kröning <[email protected]>

examples/demo/src/main.rs

@@ -1,5 +1,4 @@
 #![allow(dead_code)]
-#![allow(unused_imports)]
 #![feature(thread_id_value)]
 
 #[cfg(target_os = "hermit")]

examples/demo/src/tests.rs

@@ -1,9 +1,8 @@
 use std::f64::consts::{E, PI};
 use std::fs::File;
 use std::io::{Read, Write};
-use std::net::{TcpListener, TcpStream};
 use std::time::{self, Instant};
-use std::{env, str, thread, vec};
+use std::{env, thread, vec};
 
 #[cfg(target_arch = "aarch64")]
 use aarch64::regs::*;