Remove HN post from REAMDE.

Old news now :)

README.md

@@ -4,7 +4,6 @@ ShareLaTeX
 [ShareLaTeX](https://www.sharelatex.com) is now open source! ShareLaTeX is an online real-time collaborative LaTeX editor, and you can now run your own local version where you can host, edit, collaborate in real-time, and compile your LaTeX documents. We’re still 100% focused on running the hosted version at http://www.sharelatex.com, but we want to be more flexible in how you can use ShareLaTeX, and give something back to our wonderful community.
 
 **[Read more on our blog](https://www.sharelatex.com/blog/2014/02/21/sharelatex-is-now-open-source.html#.UwcnsEJ_ugc)**
-or **[join in the discussion on Hacker News](https://news.ycombinator.com/item?id=7276263)**
 
 Installation
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