drop with2 and with3

src/header/common/mod.rs

@@ -74,8 +74,6 @@ macro_rules! test_header {
     ($id:ident, $raw:expr) => {
         #[test]
         fn $id() {
-            #[allow(unused, deprecated)]
-            use std::ascii::AsciiExt;
             use test;
             let raw = $raw;
             let a: Vec<Vec<u8>> = raw.iter().map(|x| x.to_vec()).collect();

src/header/shared/charset.rs

@@ -1,5 +1,3 @@
-#![allow(unused, deprecated)]
-use std::ascii::AsciiExt;
 use std::fmt::{self, Display};
 use std::str::FromStr;
 

src/header/shared/quality_item.rs

@@ -1,5 +1,3 @@
-#![allow(unused, deprecated)]
-use std::ascii::AsciiExt;
 use std::cmp;
 use std::default::Default;
 use std::fmt;