Merge pull request #16 from tormol/no_build_warnings

Remove unused `use`s

Author: Thomas Bahn

src/ascii.rs

@@ -1,4 +1,5 @@
 use std::fmt;
+#[cfg(feature="unstable")]
 use std::ascii::AsciiExt;
 
 use AsciiCast;

src/lib.rs

@@ -18,7 +18,6 @@ mod ascii;
 mod ascii_string;
 mod ascii_str;
 
-use std::mem;
 use std::borrow::Borrow;
 use std::ascii::AsciiExt;