Make Referrer.policy types parseable by e-t-d

docs/api/structures/referrer.md

@@ -3,8 +3,8 @@
 * `url` String - HTTP Referrer URL.
 * `policy` String - Can be `default`, `unsafe-url`,
   `no-referrer-when-downgrade`, `no-referrer`, `origin`,
-  `strict-origin-when-cross-origin`, `same-origin`, `strict-origin`, or
-  `no-referrer`. See the [Referrer-Policy spec][1] for more details on the
+  `strict-origin-when-cross-origin`, `same-origin`, `strict-origin`.
+  See the [Referrer-Policy spec][1] for more details on the
   meaning of these values.
 
 [1]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy