chore(features): remove feature gate 'alloc'

src/client/request.rs

@@ -176,7 +176,6 @@ impl Write for Request<Streaming> {
 
 #[cfg(test)]
 mod tests {
-    use std::boxed::BoxAny;
     use std::str::from_utf8;
     use url::Url;
     use method::Method::{Get, Head};

src/client/response.rs

@@ -103,7 +103,6 @@ impl Read for Response {
 #[cfg(test)]
 mod tests {
     use std::borrow::Cow::Borrowed;
-    use std::boxed::BoxAny;
     use std::io::{self, Read};
     use std::marker::PhantomData;
 

src/lib.rs

@@ -2,7 +2,7 @@
 #![feature(core, io, unsafe_destructor, into_cow, convert)]
 #![deny(missing_docs)]
 #![cfg_attr(test, deny(warnings))]
-#![cfg_attr(test, feature(alloc, test))]
+#![cfg_attr(test, feature(test))]
 
 //! # Hyper
 //! Hyper is a fast, modern HTTP implementation written in and for Rust. It