docs: remove tip

Author: fundon

README.md

@@ -27,10 +27,6 @@
       alt="Twitter: @_fundon" /></a>
 </div>
 
-> **Note**: form-data's [main](https://github.com/viz-rs/form-data) branch is
-> currently preparing breaking changes. For the most recently *released* code,
-> look to the [0.4.x branch](https://github.com/viz-rs/form-data/tree/0.4.x).
-
 ## Features
 
 - **Stream**: `Form`, `Field`