refactor: use IsTerminal from std instead of is-terminal crate

Cargo.lock

@@ -274,7 +274,6 @@ dependencies = [
  "ignore",
  "im-rc",
  "indexmap",
- "is-terminal",
  "itertools",
  "jobserver",
  "lazy_static",
@@ -2658,7 +2657,6 @@ version = "0.0.0"
 dependencies = [
  "cargo",
  "cargo-util",
- "is-terminal",
  "lazy_static",
  "proptest",
  "varisat",

Cargo.toml

@@ -45,7 +45,6 @@ humantime = "2.0.0"
 ignore = "0.4.7"
 im-rc = "15.0.0"
 indexmap = "1"
-is-terminal = "0.4.4"
 itertools = "0.10.0"
 jobserver = "0.1.26"
 lazy_static = "1.3.0"
@@ -136,7 +135,6 @@ humantime.workspace = true
 ignore.workspace = true
 im-rc.workspace = true
 indexmap.workspace = true
-is-terminal.workspace = true
 itertools.workspace = true
 jobserver.workspace = true
 lazy_static.workspace = true

crates/resolver-tests/Cargo.toml

@@ -7,7 +7,6 @@ publish = false
 [dependencies]
 cargo.workspace = true
 cargo-util.workspace = true
-is-terminal.workspace = true
 lazy_static.workspace = true
 proptest.workspace = true
 varisat.workspace = true

crates/resolver-tests/tests/resolve.rs

@@ -1,3 +1,5 @@
+use std::io::IsTerminal;
+
 use cargo::core::dependency::DepKind;
 use cargo::core::Dependency;
 use cargo::util::Config;
@@ -21,7 +23,7 @@ use proptest::prelude::*;
 proptest! {
     #![proptest_config(ProptestConfig {
         max_shrink_iters:
-            if is_ci() || !is_terminal::IsTerminal::is_terminal(&std::io::stderr()){
+            if is_ci() || !std::io::stderr().is_terminal() {
                 // This attempts to make sure that CI will fail fast,
                 0
             } else {

src/cargo/core/shell.rs

@@ -1,7 +1,7 @@
 use std::fmt;
 use std::io::prelude::*;
+use std::io::IsTerminal;
 
-use is_terminal::IsTerminal;
 use termcolor::Color::{Cyan, Green, Red, Yellow};
 use termcolor::{self, Color, ColorSpec, StandardStream, WriteColor};