Cleans up cfg use in lib for serde_derive.
@@ -57,7 +57,7 @@ extern crate rusoto_credential;
extern crate rustc_serialize;
extern crate serde;
// Only bring in serde_derive for services that use it.
-#[cfg(any(feature = "needs_serde_derive"))]
+#[cfg(feature = "needs_serde_derive")]
#[macro_use]
extern crate serde_derive;
extern crate serde_json;
