Remove unnecessary extern statements

cli/global_timer.rs

@@ -8,9 +8,9 @@
 //! only need to be able to start and cancel a single timer (or Delay, as Tokio
 //! calls it) for an entire Isolate. This is what is implemented here.
 
-use crate::futures::TryFutureExt;
 use futures::channel::oneshot;
 use futures::future::FutureExt;
+use futures::TryFutureExt;
 use std::future::Future;
 use std::time::Instant;
 

cli/main.rs

@@ -1,25 +1,11 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 
-extern crate dissimilar;
 #[macro_use]
 extern crate lazy_static;
 #[macro_use]
 extern crate log;
-extern crate futures;
 #[macro_use]
 extern crate serde_json;
-extern crate clap;
-extern crate deno_core;
-extern crate encoding_rs;
-extern crate indexmap;
-#[cfg(unix)]
-extern crate nix;
-extern crate rand;
-extern crate regex;
-extern crate reqwest;
-extern crate serde;
-extern crate tokio;
-extern crate url;
 
 mod ast;
 mod checksum;

cli/ops/io.rs

@@ -30,9 +30,6 @@ use std::os::unix::io::FromRawFd;
 #[cfg(windows)]
 use std::os::windows::io::FromRawHandle;
 
-#[cfg(windows)]
-extern crate winapi;
-
 lazy_static! {
   /// Due to portability issues on Windows handle to stdout is created from raw
   /// file descriptor.  The caveat of that approach is fact that when this

cli/ops/runtime_compiler.rs

@@ -1,12 +1,12 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 
-use crate::futures::FutureExt;
 use crate::tsc::runtime_bundle;
 use crate::tsc::runtime_compile;
 use crate::tsc::runtime_transpile;
 use deno_core::error::AnyError;
 use deno_core::BufVec;
 use deno_core::OpState;
+use futures::FutureExt;
 use serde::Deserialize;
 use serde_json::Value;
 use std::cell::RefCell;

cli/tests/integration_tests.rs

@@ -1,14 +1,9 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-#[cfg(unix)]
-extern crate nix;
-extern crate tempfile;
-
-use test_util as util;
-
 use futures::prelude::*;
 use std::io::{BufRead, Write};
 use std::process::Command;
 use tempfile::TempDir;
+use test_util as util;
 
 #[test]
 fn std_tests() {

cli/upgrade.rs

@@ -6,13 +6,11 @@
 //! the future it can be easily extended to provide
 //! the same functions as ops available in JS runtime.
 
-extern crate semver_parser;
-use crate::futures::FutureExt;
 use crate::http_util::fetch_once;
 use crate::http_util::FetchOnceResult;
 use crate::AnyError;
 use deno_core::error::custom_error;
-
+use futures::FutureExt;
 use regex::Regex;
 use reqwest::{redirect::Policy, Client};
 use semver_parser::version::parse as semver_parse;