Remove unneeded extern crate, macro_use, and tidy uses.

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;