Cleanup lib.rs

Author: josephlr

src/lib.rs

@@ -127,27 +127,25 @@ cfg_if! {
     }
 }
 
-#[cfg(feature = "std")]
-extern crate std;
-
 mod error;
 pub use crate::error::Error;
 
 #[allow(dead_code)]
 mod util;
+// Unlike the other Unix, Fuchsia and iOS don't use the libc to make any calls.
 #[cfg(any(
-    target_os = "netbsd",
-    target_os = "openbsd",
     target_os = "android",
-    target_os = "linux",
+    target_os = "dragonfly",
     target_os = "emscripten",
-    target_os = "solaris",
-    target_os = "illumos",
-    target_os = "macos",
     target_os = "freebsd",
     target_os = "haiku",
+    target_os = "illumos",
+    target_os = "linux",
+    target_os = "macos",
+    target_os = "netbsd",
+    target_os = "openbsd",
     target_os = "redox",
-    target_os = "dragonfly",
+    target_os = "solaris",
 ))]
 #[allow(dead_code)]
 mod util_libc;