Remove unneeded extern crate, macro_use, and tidy uses.

crates/wasi-c/src/lib.rs

@@ -1,5 +1,3 @@
-#[macro_use]
-extern crate log;
 extern crate alloc;
 extern crate core;
 

crates/wasi-c/src/syscalls.rs

@@ -1,10 +1,10 @@
-use crate::host;
 use crate::host::{argv_environ_values, fd_prestats, fd_table};
 use crate::instantiate::WASIState;
 use crate::translate::*;
-use crate::wasm32;
+use crate::{host, wasm32};
 use core::convert::TryFrom;
 use cranelift_codegen::ir::types::{Type, I32, I64};
+use log::{log_enabled, trace};
 use std::{mem, ptr, slice, str};
 use wasmtime_runtime::VMContext;
 

crates/wasi-c/src/translate.rs

@@ -1,6 +1,6 @@
-use crate::host;
-use crate::wasm32;
+use crate::{host, wasm32};
 use core::convert::TryFrom;
+use log::{debug, error};
 use more_asserts::assert_le;
 use std::mem::{align_of, size_of, zeroed};
 use std::slice;