Meta: update copyright license and Bikeshed boilerplate

See https://blog.whatwg.org/copyright-license-change for the former and
whatwg/meta#23 plus
speced/bikeshed#1155 for the latter. The new
boilerplate includes the new copyright license, so this commit just
removes it from the source file, as it does many other things that are
now deduplicated into the Bikeshed boilerplate.

url.bs

@@ -1,26 +1,12 @@
 <pre class=metadata>
-Title: URL Standard
 Group: WHATWG
 H1: URL
 Shortname: url
-Status: LS
-No Editor: true
+Text Macro: TWITTER urlstandard
 Abstract: The URL Standard defines URLs, domains, IP addresses, the <code title>application/x-www-form-urlencoded</code> format, and their API.
-Logo: https://resources.whatwg.org/logo-url.svg
-Boilerplate: omit feedback-header, omit conformance
-!Participate: <a href=https://github.com/whatwg/url>GitHub whatwg/url</a> (<a href=https://github.com/whatwg/url/issues/new>new issue</a>, <a href="https://github.com/whatwg/url/issues">open issues</a>)
-!Participate: <a href="https://wiki.whatwg.org/wiki/IRC">IRC: #whatwg on Freenode</a>
-!Commits: <a href="https://github.com/whatwg/url/commits">https://github.com/whatwg/url/commits</a>
-!Commits: [SNAPSHOT-LINK]
-!Commits: <a href="https://twitter.com/urlstandard">@urlstandard</a>
-!Tests: <a href=https://github.com/w3c/web-platform-tests/tree/master/url>web-platform-tests url/</a> (<a href=https://github.com/w3c/web-platform-tests/labels/url>ongoing work</a>)
-!Translation (non-normative): <span title=Japanese><a href=https://triple-underscore.github.io/URL-ja.html lang=ja hreflang=ja rel=alternate>日本語</a></span>
+Translation: ja https://triple-underscore.github.io/URL-ja.html
 </pre>
 
-<script src=https://resources.whatwg.org/file-issue.js async></script>
-<script src=https://resources.whatwg.org/commit-snapshot-shortcut-key.js async></script>
-<script src=https://resources.whatwg.org/dfn.js defer></script>
-
 
 <h2 id=goals class=no-num>Goals</h2>
 
@@ -3195,10 +3181,6 @@ for being awesome!
 (<a href=https://www.mozilla.org/>Mozilla</a>,
 <a href=mailto:[email protected]>[email protected]</a>).
 
-<p>Per <a rel=license href=https://creativecommons.org/publicdomain/zero/1.0/>CC0</a>, to the extent
-possible under law, the editor has waived all copyright and related or neighboring rights to this
-work.
-
 <pre class=anchors>
 spec: MEDIA-SOURCE; urlPrefix: https://w3c.github.io/media-source/#idl-def-
     type: interface; text: MediaSource