kdf: remove redundant build-* badge links from README.md

Author: tarcieri

kdf/README.md

@@ -46,8 +46,6 @@ dual licensed as above, without any additional terms or conditions.
 [rustc-image]: https://img.shields.io/badge/rustc-1.85+-blue.svg
 [chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
 [chat-link]: https://rustcrypto.zulipchat.com/#narrow/channel/260043-KDFs
-[build-image]: https://github.com/RustCrypto/traits/actions/workflows/kdf.yml/badge.svg?branch=master
-[build-link]: https://github.com/RustCrypto/traits/actions/workflows/kdf.yml?query=branch:master
 
 [//]: # (links)