Remove link to ySlow (#1957)

Yahoo's YSlow is (sadly) no longer actively maintained. The browser extensions don't work anymore and the main repo hasn't been updated for nearly four years. I suggest to remove the http://developer.yahoo.com/yslow/ link.
h5bp · Jul 6, 2017 · 957f9f3 · 957f9f3
1 parent 76bafcf
commit 957f9f3
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/src/doc/html.md b/src/doc/html.md
@@ -209,8 +209,7 @@ being able to serve jQuery to Chinese users.
 While the jQuery CDN is a strong default solution your site or application may
 require a different configuration. Testing your site with services like
 [WebPageTest](https://www.webpagetest.org/) and browser tools like
-[PageSpeed Insights](https://developers.google.com/speed/pagespeed/insights/) or
-[YSlow](https://developer.yahoo.com/yslow/) will help you examine the real
+[PageSpeed Insights](https://developers.google.com/speed/pagespeed/insights/) will help you examine the real
 world performance of your site and can show where you can optimize your specific
 site or application.