Removed "Release Notes" from README.md

We have the Release Notes in a separate File, so this was a duplicate

Author: NLueg

README.md

@@ -37,8 +37,3 @@ The language and culture can also be changed with the status bar:
 
 Nearly all currently released features of openVALIDATION are supported here. But we currently don't support multiple files which are bundled with the [import](https://docs.openvalidation.io/grammatik/strukturierung-des-regelwerkes#splitting-the-set-of-rules-into-several-files) command. We still need to find a way to implement language features for multiple files in openVALIDATION.
 
-## Release Notes
-
-### 0.1.0
-
-Initial release.