Update README.md

Author: jeantimex

README.md

@@ -2,9 +2,7 @@
 
 A simple iOS swift project demonstrates how to implement collapsible table section programmatically, that is no main storyboard, no XIB, no need to register nib, just purely Swift!
 
-[![Language](https://img.shields.io/badge/swift-2.3-brightgreen.svg?style=flat)]()
-
-For Swift 3.0, we are migrating in [migrate-to-swift-3.0](https://github.com/jeantimex/ios-swift-collapsible-table-section/tree/migrate-to-swift-3.0) branch, eventually it will be merged back to master branch.
+[![Language](https://img.shields.io/badge/swift-3.0-brightgreen.svg?style=flat)]()
 
 ### Demo ###