servo: Merge #20454 - Update to rustc 1.25.0-nightly (bacb5c58d 2018-01-26) (from emilio:rustup); r=SimonSapin

Update to rust version 1.26.0-nightly (188e693b3 2018-03-26)

Source-Repo: https://github.com/servo/servo
Source-Revision: d232705106478e0a2e5de78f8b40144408879c36

--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 23aea1a3df83ee3f89d229ac92e02615cf3569a9

servo/components/selectors/attr.rs

@@ -4,7 +4,6 @@
 
 use cssparser::ToCss;
 use parser::SelectorImpl;
-#[allow(unused_imports)] use std::ascii::AsciiExt;
 use std::fmt;
 
 #[derive(Clone, Eq, PartialEq)]

servo/components/selectors/parser.rs

@@ -14,7 +14,6 @@ use precomputed_hash::PrecomputedHash;
 use servo_arc::ThinArc;
 use sink::Push;
 use smallvec::SmallVec;
-#[allow(unused_imports)] use std::ascii::AsciiExt;
 use std::borrow::{Borrow, Cow};
 use std::fmt::{self, Display, Debug, Write};
 use std::iter::Rev;

servo/components/style_traits/viewport.rs

@@ -7,7 +7,6 @@
 use {CSSPixel, CssWriter, ParseError, PinchZoomFactor, ToCss};
 use cssparser::Parser;
 use euclid::TypedSize2D;
-#[allow(unused_imports)] use std::ascii::AsciiExt;
 use std::fmt::{self, Write};
 
 define_css_keyword_enum! {

servo/rust-toolchain

@@ -1 +1 @@
-nightly-2018-01-21
+nightly-2018-01-27