remove alert from readme

Author: Kiran

README.md

@@ -6,12 +6,6 @@
 
 ## [Documentation](http://react-slick.neostack.com)
 
-### :warning: Alert
-
-:construction: react-slick@0.27.* releases are experimental.  
-:white_check_mark: **Use react-slick@0.26 in production** until we make our next stable release (react-slick@0.28)  
-:pray: We invite you to test react-slick@0.27.* in dev environment and report any breaking changes.
-
 ### Installation
 
 **npm**
@@ -118,4 +112,3 @@ open http://localhost:8080
 ## Contributing
 
 Please see the [contributing guidelines](./CONTRIBUTING.md)
-