Reduce warnings

src/header/sys_ioctl/mod.rs

@@ -24,7 +24,7 @@ pub struct winsize {
 #[cfg(target_os = "linux")]
 pub mod inner {
     use platform::types::*;
-    use platform::{Pal, Sys};
+    use platform::Sys;
 
     #[no_mangle]
     pub extern "C" fn ioctl(fd: c_int, request: c_ulong, out: *mut c_void) -> c_int {