Remove unneeded extern crate, macro_use, and tidy uses.

crates/wasi-common/src/error.rs

@@ -2,9 +2,8 @@
 #![allow(clippy::use_self)]
 use crate::wasi;
 use std::convert::Infallible;
-use std::fmt;
 use std::num::TryFromIntError;
-use std::str;
+use std::{fmt, str};
 use thiserror::Error;
 
 #[derive(Clone, Copy, Debug, Error, Eq, PartialEq)]

crates/wasi-common/src/hostcalls/misc.rs

@@ -2,7 +2,6 @@
 use crate::ctx::WasiCtx;
 use crate::{wasi, wasi32};
 use log::trace;
-
 use wasi_common_cbindgen::wasi_common_cbindgen;
 
 #[wasi_common_cbindgen]

crates/wasi-common/src/wasi32.rs

@@ -6,9 +6,8 @@
 #![allow(non_snake_case)]
 #![allow(dead_code)]
 
-use wig::witx_wasi32_types;
-
 use crate::wasi::*;
+use wig::witx_wasi32_types;
 
 pub type uintptr_t = u32;
 pub type size_t = u32;