html: remove license references from benchmark test data

The license references puzzle programs that grep for licenses.

Fixes golang/go#13573.

Change-Id: I601fbc6ba2b189b476af1082c48fb02cd72f59d8
Reviewed-on: https://go-review.googlesource.com/17714
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

html/testdata/go1.html

@@ -2210,10 +2210,10 @@ the distributions themselves are listed on the
 
 <div id="footer">
 Build version go1.0.1.<br>
-Except as <a href="http://code.google.com/policies.html#restrictions">noted</a>,
-the content of this page is licensed under the
-Creative Commons Attribution 3.0 License,
-and code is licensed under a <a href="/LICENSE">BSD license</a>.<br>
+A link <a href="http://code.google.com/policies.html#restrictions">noted</a>,
+and then, coming up on the very next line, we will
+find yet another link, link 3.0 if you will,
+after a few more words <a href="/LINK">link text</a>.<br>
 <a href="/doc/tos.html">Terms of Service</a> | 
 <a href="http://www.google.com/intl/en/privacy/privacy-policy.html">Privacy Policy</a>
 </div>