Remove unneeded extern crate, macro_use, and tidy uses.

src/bin/wasm2obj.rs

@@ -29,11 +29,9 @@
     )
 )]
 
-use cranelift_codegen::isa;
-use cranelift_codegen::settings;
 use cranelift_codegen::settings::Configurable;
+use cranelift_codegen::{isa, settings};
 use cranelift_entity::EntityRef;
-use cranelift_native;
 use cranelift_wasm::DefinedMemoryIndex;
 use docopt::Docopt;
 use faerie::Artifact;
@@ -41,21 +39,18 @@ use serde::Deserialize;
 use std::error::Error;
 use std::fmt::format;
 use std::fs::File;
-use std::io;
 use std::io::prelude::*;
-use std::path::Path;
-use std::path::PathBuf;
-use std::process;
-use std::str;
+use std::path::{Path, PathBuf};
 use std::str::FromStr;
+use std::{io, process, str};
 use target_lexicon::Triple;
 use wasmtime_cli::pick_compilation_strategy;
 use wasmtime_debug::{emit_debugsections, read_debuginfo};
 #[cfg(feature = "lightbeam")]
 use wasmtime_environ::Lightbeam;
-use wasmtime_environ::{cache_create_new_config, cache_init};
 use wasmtime_environ::{
-    Compiler, Cranelift, ModuleEnvironment, ModuleVmctxInfo, Tunables, VMOffsets,
+    cache_create_new_config, cache_init, Compiler, Cranelift, ModuleEnvironment, ModuleVmctxInfo,
+    Tunables, VMOffsets,
 };
 use wasmtime_jit::CompilationStrategy;
 use wasmtime_obj::emit_module;

src/bin/wasmtime.rs

@@ -34,13 +34,11 @@ use anyhow::{bail, Context as _, Result};
 use cranelift_codegen::settings;
 use cranelift_codegen::settings::Configurable;
 use docopt::Docopt;
-use pretty_env_logger;
 use serde::Deserialize;
 use std::collections::HashMap;
 use std::ffi::OsStr;
 use std::fs::File;
-use std::path::Component;
-use std::path::Path;
+use std::path::{Component, Path};
 use std::process::exit;
 use wasi_common::preopen_dir;
 use wasmtime_api::{Config, Engine, HostRef, Instance, Module, Store};
@@ -49,10 +47,9 @@ use wasmtime_environ::{cache_create_new_config, cache_init};
 use wasmtime_interface_types::ModuleData;
 use wasmtime_jit::Features;
 use wasmtime_wasi::instantiate_wasi;
-use wasmtime_wast::instantiate_spectest;
-
 #[cfg(feature = "wasi-c")]
 use wasmtime_wasi_c::instantiate_wasi_c;
+use wasmtime_wast::instantiate_spectest;
 
 const USAGE: &str = "
 Wasm runner.