bootstrap: remove dep `is-terminal`

src/bootstrap/Cargo.lock

@@ -51,7 +51,6 @@ dependencies = [
  "filetime",
  "hex",
  "ignore",
- "is-terminal",
  "junction",
  "libc",
  "object",
@@ -386,18 +385,6 @@ dependencies = [
  "windows-sys",
 ]
 
-[[package]]
-name = "is-terminal"
-version = "0.4.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "256017f749ab3117e93acb91063009e1f1bb56d03965b14c2c8df4eb02c524d8"
-dependencies = [
- "hermit-abi 0.3.1",
- "io-lifetimes",
- "rustix",
- "windows-sys",
-]
-
 [[package]]
 name = "itoa"
 version = "1.0.2"

src/bootstrap/Cargo.toml

@@ -30,7 +30,6 @@ path = "bin/sccache-plus-cl.rs"
 test = false
 
 [dependencies]
-is-terminal = "0.4"
 build_helper = { path = "../tools/build_helper" }
 cmake = "0.1.38"
 filetime = "0.2"

src/bootstrap/config.rs

@@ -12,6 +12,7 @@ use std::collections::{HashMap, HashSet};
 use std::env;
 use std::fmt;
 use std::fs;
+use std::io::IsTerminal;
 use std::path::{Path, PathBuf};
 use std::process::Command;
 use std::str::FromStr;
@@ -894,8 +895,6 @@ define_config! {
 
 impl Config {
     pub fn default_opts() -> Config {
-        use is_terminal::IsTerminal;
-
         let mut config = Config::default();
         config.llvm_optimize = true;
         config.ninja_in_file = true;