Update README.md

Remove breaking change notice from readme

Author: nason

README.md

@@ -8,14 +8,6 @@ This middleware receives [*Redux Standard API-calling Actions*](#redux-standard-
 
 RSAAs are identified by the presence of an `[RSAA]` property, where [`RSAA`](#rsaa) is a `String` constant defined in, and exported by `redux-api-middleware`. They contain information describing an API call and three different types of FSAs, known as the *request*, *success* and *failure* FSAs.
 
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-### Breaking Change Notice
-3.0 is being prepared in the [`next` branch](https://github.com/agraboso/redux-api-middleware/tree/next), and can be installed via npm: `npm install redux-api-middleware@next`
-
-:rotating_light: There are a few breaking changes in 3.0, notably a change to the RSAA spec around error handling during the request phase :rotating_light:
-
-See the changes in the [beta's documentation](https://github.com/agraboso/redux-api-middleware/blob/next/README.md), or the [diff from the latest release](https://github.com/agraboso/redux-api-middleware/compare/next) to learn more.
-
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 ## Table of contents