Remove use of deprecated AsciiExt trait

Author: SimonSapin

macros/lib.rs

@@ -13,8 +13,6 @@ extern crate syn;
 
 use proc_macro2::{TokenStream, TokenTree};
 use quote::TokenStreamExt;
-#[allow(unused_imports)]
-use std::ascii::AsciiExt;
 use std::iter;
 
 define_proc_macros! {

src/macros.rs

@@ -132,7 +132,7 @@ pub fn _internal__to_lowercase<'a>(buffer: &'a mut [u8], input: &'a str) -> Opti
     if let Some(buffer) = buffer.get_mut(..input.len()) {
         if let Some(first_uppercase) = input.bytes().position(|byte| matches!(byte, b'A'...b'Z')) {
             buffer.copy_from_slice(input.as_bytes());
-            ::std::ascii::AsciiExt::make_ascii_lowercase(&mut buffer[first_uppercase..]);
+            buffer[first_uppercase..].make_ascii_lowercase();
             // `buffer` was initialized to a copy of `input` (which is &str so well-formed UTF-8)
             // then lowercased (which preserves UTF-8 well-formedness)
             unsafe { Some(::std::str::from_utf8_unchecked(buffer)) }

src/nth.rs

@@ -2,9 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-#[allow(unused_imports)]
-use std::ascii::AsciiExt;
-
 use super::{BasicParseError, Parser, ParserInput, Token};
 
 /// Parse the *An+B* notation, as found in the `:nth-child()` selector.

src/parser.rs

@@ -4,8 +4,6 @@
 
 use cow_rc_str::CowRcStr;
 use smallvec::SmallVec;
-#[allow(unused_imports)]
-use std::ascii::AsciiExt;
 use std::ops::BitOr;
 use std::ops::Range;
 use tokenizer::{SourceLocation, SourcePosition, Token, Tokenizer};

src/rules_and_declarations.rs

@@ -8,8 +8,6 @@ use super::{BasicParseError, BasicParseErrorKind, Delimiter};
 use super::{ParseError, Parser, SourceLocation, Token};
 use cow_rc_str::CowRcStr;
 use parser::{parse_nested_block, parse_until_after, parse_until_before, ParserState};
-#[allow(unused_imports)]
-use std::ascii::AsciiExt;
 
 /// Parse `!important`.
 ///

src/serializer.rs

@@ -4,8 +4,6 @@
 
 use dtoa_short::{self, Notation};
 use itoa;
-#[allow(unused_imports)]
-use std::ascii::AsciiExt;
 use std::fmt::{self, Write};
 use std::io;
 use std::str;

src/tokenizer.rs

@@ -4,8 +4,6 @@
 
 // https://drafts.csswg.org/css-syntax/#tokenization
 
-#[allow(unused_imports)]
-use std::ascii::AsciiExt;
 use std::char;
 use std::i32;
 use std::ops::Range;