Removed broken link

rules/do-you-manage-3rd-party-dependencies/rule.md

@@ -35,8 +35,6 @@ Although China is the most well-known country for blocking sites, other countrie
 
 ![Figure: Blocked sites](social-media-blocked.png)
 
-**Source:** [freebrowsinglink.com/countries-banned-social-media](https://www.freebrowsinglink.com/countries-banned-social-media/)
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 If the runtime operation of your site depends upon these services, your website will either fail or perform poorly for users in China. Start by reviewing how many of these services are essential, what they do and whether there are China-based equivalents. The fewer external dependencies in your site, the easier it will be to Chinafy.
 
 Every attempted request to a blocked service can add serious delays to your site's performance as each one can take over a minute to timeout. When loading a page, browsers have a limit on the number of simultaneous connections they will open. Google Chrome, for example, will support 6 connections to one domain and 10 connections overall. If all those connections get used attempting to connect to blocked resources, the entire page loading process can stall for minutes!