docs(README): remove disclaimer

Author: maybebyte

README.md

@@ -6,10 +6,6 @@ format. Specifically, it deals with client configuration files. It
 also performs some validation to ensure that each option in each
 section is set to a reasonable value.
 
-This tool is still under development. It's usable as is, but consider
-the API unstable. When it's ready for public consumption, I'll
-create a release.
-
 ## Example usage
 
 There is a file named `test.ini` in the tests directory. Here are