Remove the unstable std_unicode crate, deprecated since 1.27

Its former contents are now in libcore.

src/Cargo.lock

@@ -2615,18 +2615,9 @@ dependencies = [
  "rustc_lsan 0.0.0",
  "rustc_msan 0.0.0",
  "rustc_tsan 0.0.0",
- "std_unicode 0.0.0",
  "unwind 0.0.0",
 ]
 
-[[package]]
-name = "std_unicode"
-version = "0.0.0"
-dependencies = [
- "compiler_builtins 0.0.0",
- "core 0.0.0",
-]
-
 [[package]]
 name = "string_cache"
 version = "0.7.3"

src/bootstrap/compile.rs

@@ -157,7 +157,6 @@ pub fn std_cargo(builder: &Builder,
         cargo.arg("--features").arg("c mem")
             .args(&["-p", "alloc"])
             .args(&["-p", "compiler_builtins"])
-            .args(&["-p", "std_unicode"])
             .arg("--manifest-path")
             .arg(builder.src.join("src/rustc/compiler_builtins_shim/Cargo.toml"));
     } else {

src/bootstrap/dist.rs

@@ -856,7 +856,6 @@ impl Step for Src {
             "src/librustc_msan",
             "src/librustc_tsan",
             "src/libstd",
-            "src/libstd_unicode",
             "src/libunwind",
             "src/rustc/compiler_builtins_shim",
             "src/rustc/libc_shim",

src/bootstrap/doc.rs

@@ -489,7 +489,7 @@ impl Step for Std {
         // Keep a whitelist so we do not build internal stdlib crates, these will be
         // build by the rustc step later if enabled.
         cargo.arg("--no-deps");
-        for krate in &["alloc", "core", "std", "std_unicode"] {
+        for krate in &["alloc", "core", "std"] {
             cargo.arg("-p").arg(krate);
             // Create all crate output directories first to make sure rustdoc uses
             // relative links.

src/libstd/Cargo.toml

@@ -22,7 +22,6 @@ core = { path = "../libcore" }
 libc = { path = "../rustc/libc_shim" }
 compiler_builtins = { path = "../rustc/compiler_builtins_shim" }
 profiler_builtins = { path = "../libprofiler_builtins", optional = true }
-std_unicode = { path = "../libstd_unicode" }
 unwind = { path = "../libunwind" }
 
 [dev-dependencies]

src/libstd_unicode/Cargo.toml

@@ -1,14 +0,0 @@
-[package]
-authors = ["The Rust Project Developers"]
-name = "std_unicode"
-version = "0.0.0"
-
-[lib]
-name = "std_unicode"
-path = "lib.rs"
-test = false
-bench = false
-
-[dependencies]
-core = { path = "../libcore" }
-compiler_builtins = { path = "../rustc/compiler_builtins_shim" }

src/libstd_unicode/lib.rs

@@ -1,36 +0,0 @@
-// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! # The Unicode Library
-//!
-//! Unicode-intensive functions for `char` and `str` types.
-//!
-//! This crate provides a collection of Unicode-related functionality,
-//! including decompositions, conversions, etc., and provides traits
-//! implementing these functions for the `char` and `str` types.
-//!
-//! The functionality included here is only that which is necessary to
-//! provide for basic string-related manipulations. This crate does not
-//! (yet) aim to provide a full set of Unicode tables.
-
-#![unstable(feature = "unicode", issue = "27783")]
-#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
-       html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
-       html_root_url = "https://doc.rust-lang.org/nightly/",
-       html_playground_url = "https://play.rust-lang.org/",
-       issue_tracker_base_url = "https://github.com/rust-lang/rust/issues/",
-       test(no_crate_inject, attr(allow(unused_variables), deny(warnings))))]
-#![no_std]
-
-#![feature(unicode_internals)]
-#![feature(staged_api)]
-#![rustc_deprecated(since = "1.27.0", reason = "moved into libcore")]
-
-pub use core::unicode::*;