Remove note about duplicate header keys
The upstream issue is fixed in v0.1.6 and newer.
@@ -33,13 +33,8 @@ noteworthy behavior:
* `remote_addr` always returns 0.0.0.0:0
* `host` returns an empty string if the `Host` header is not valid UTF-8
-There is currently a bug where the `all` method of `headers` may include
-duplicate keys multiple times. See [this issue] for further details.
-
All other methods on `Request` should behave as expected.
-[this issue]: https://github.com/hyperium/http/issues/199
-
## TODO
* Include the `X-Request-Id` header when logging an error
