Remove unneeded impl

sfackler · sfackler · commit 60eaaad08fc4 · 2015-06-01T21:27:18.000-07:00
diff --git a/src/message.rs b/src/message.rs
@@ -431,4 +431,3 @@ macro_rules! from_usize {
 
 from_usize!(u16);
 from_usize!(i32);
-from_usize!(u32);
