Remove allow(improper_ctypes) (#797)

This was a bug on nightly a month or so ago but has since been fixed!

crates/api/src/lib.rs

@@ -6,8 +6,6 @@
 //! and there to implement Rust idioms. This crate also defines the actual C API
 //! itself for consumption from other languages.
 
-#![allow(improper_ctypes)]
-
 mod callable;
 mod context;
 mod externals;

crates/misc/py/src/lib.rs

@@ -1,5 +1,3 @@
-#![allow(improper_ctypes)]
-
 use crate::function::{wrap_into_pyfunction, Function};
 use crate::instance::Instance;
 use crate::memory::Memory;

crates/runtime/src/lib.rs

@@ -1,6 +1,5 @@
 //! Runtime library support for Wasmtime.
 
-#![allow(improper_ctypes)]
 #![deny(missing_docs, trivial_numeric_casts, unused_extern_crates)]
 #![warn(unused_import_braces)]
 #![cfg_attr(feature = "clippy", plugin(clippy(conf_file = "../../clippy.toml")))]

crates/wasi/src/lib.rs

@@ -1,5 +1,3 @@
-#![allow(improper_ctypes)]
-
 mod instantiate;
 pub mod old;
 

crates/wasi/src/old/snapshot_0/mod.rs

@@ -1,5 +1,3 @@
-#![allow(improper_ctypes)]
-
 extern crate alloc;
 
 mod instantiate;

crates/wast/src/spectest.rs

@@ -1,5 +1,3 @@
-#![allow(improper_ctypes)]
-
 use anyhow::Result;
 use std::collections::HashMap;
 use std::rc::Rc;