Remove thinkup (discontinued) (#1121)

Fixes #1106

README.md

@@ -108,7 +108,6 @@ _Web Analytics_
   * [Rakam](https://rakam.io/) - Custom analytics platform that allows you to create your own analytics services. Integrate with any data source (web, mobile, IoT etc.), analyze data with SQL and create dashboards. ([Source Code](https://github.com/rakam-io/rakam)) `Apache` `Java`
   * [Serposcope](https://serposcope.serphacker.com/) - Serposcope is a free and open-source rank tracker to monitor websites ranking in Google and improve your SEO performances. ([Source Code](https://github.com/serphacker/serposcope)) `MIT` `Java`
   * [Snowplow](http://snowplowanalytics.com/) - Have every single event, from your websites, mobile apps, desktop applications and server-side systems, stored in your own data warehouse and available to action in real-time. ([Source Code](https://github.com/snowplow/)) `Apache` `Scala`
-  * [ThinkUp](https://www.thinkup.com/) - Insights into your social networking activity on Twitter, Facebook, Instagram, and beyond. ([Source Code](https://github.com/ThinkUpLLC/ThinkUp)) `GPLv3` `PHP`
 
 _Business Intelligence_