Remove GitAds

Author: ninjaprox

README.md

@@ -12,10 +12,6 @@
 
 ![Demo](https://raw.githubusercontent.com/ninjaprox/NVActivityIndicatorView/master/Demo.gif)
 
-`NVActivityIndicatorView` is being sponsored by the following tool; please help to support us by taking a look and signing up to a free trial
-
-[![GitAds](https://images.gitads.io/NVActivityIndicatorView)](https://tracking.gitads.io/?repo=NVActivityIndicatorView)
-
 ## Animation types
 
 | Type                   | Type                        | Type                   | Type                       |