Remove redundant reference to swift language

README.md

@@ -9,7 +9,7 @@
 [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
 [![Twitter](https://img.shields.io/badge/twitter-@biz84-blue.svg?maxAge=2592000)](http://twitter.com/biz84)
 
-SwiftyStoreKit is a lightweight In App Purchases framework for iOS 8.0+, tvOS 9.0+ and OS X 10.10+, written in Swift.
+SwiftyStoreKit is a lightweight In App Purchases framework for iOS 8.0+, tvOS 9.0+ and OS X 10.10+.
 
 | Language  | Branch | Pod version | Xcode version |
 | --------- | ------ | ----------- | ------------- |