Merge pull request #502 from Robalni/master

Remove duplicates

free-programming-books.md

@@ -34,7 +34,6 @@
 * [Basic](#basic)
 * [C](#c)
 * [C++](#c-1)
-* [C#](#c--c)
 * [Clojure](#clojure)
 * [COBOL](#cobol)
 * [CoffeeScript](#coffeescript)
@@ -519,10 +518,6 @@
 * [The Rook's Guide to C++](http://rooksguide.org/2013/11/26/version-1-0-is-out/) (PDF)
 
 
-###C#
-* [Intro to Programming with C#](http://www.introprogramming.info/english-intro-csharp-book/)
-
-
 ###Clojure
 * [A Brief Beginner’s Guide To Clojure](http://www.unexpected-vortices.com/clojure/brief-beginners-guide/)
 * [Clojure - Functional Programming for the JVM](http://java.ociweb.com/mark/clojure/article.html)