open source blog posts updated and PR ready for review

Author: Cronus1007

content/internships/history/contents.lr

@@ -43,11 +43,8 @@ CC has participated in Google Summer of Code seven times up to 2013, and twice s
 * [Google Summer of Code 2009](https://www.google-melange.com/archive/gsoc/2009/orgs/cc)
     * [Open Source Blog posts](/blog/categories/gsoc-2009/)
 * [Google Summer of Code 2008](https://developers.google.com/open-source/gsoc/2008/#cc)
-    * [Open Source Blog posts](/blog/categories/gsoc-2013/)
 * [Google Summer of Code 2007](https://developers.google.com/open-source/gsoc/2007/#cc)
-    * [Open Source Blog posts](/blog/categories/gsoc-2013/)
 * [Google Summer of Code 2006](https://developers.google.com/open-source/gsoc/2006/#cc)
-    * [Open Source Blog posts](/blog/categories/gsoc-2013/)
 
 ### Relevant links