remove unintended export of private try_ macro

src/error.rs

@@ -185,6 +185,25 @@ pub fn too_many_redirects(url: Url) -> Error {
     }
 }
 
+macro_rules! try_ {
+    ($e:expr) => (
+        match $e {
+            Ok(v) => v,
+            Err(err) => {
+                return Err(::Error::from(::error::InternalFrom(err, None)));
+            }
+        }
+    );
+    ($e:expr, $url:expr) => (
+        match $e {
+            Ok(v) => v,
+            Err(err) => {
+                return Err(::Error::from(::error::InternalFrom(err, Some($url.clone()))));
+            }
+        }
+    )
+}
+
 #[test]
 fn test_error_get_ref_downcasts() {
     let err: Error = from(::hyper::Error::Status);