Merge pull request #24629 from david-mcmahon/release-deprecation

Automatic merge from submit-queue

Deprecate release infrastructure and doc - moved to kubernetes/release

Part 2 of kubernetes/release#1
This PR finalizes the split between the main kubernetes repo and the release tooling now under kubernetes/release.

ref #16529

README.md

@@ -110,11 +110,7 @@ Guide](../admin/README.md).
 
 ## Building releases
 
-* **Making release notes** ([making-release-notes.md](making-release-notes.md)): Generating release notes for a new release.
-
-* **Releasing Kubernetes** ([releasing.md](releasing.md)): How to create a Kubernetes release (as in version)
-  and how the version information gets embedded into the built binaries.
-
+See the [kubernetes/release](https://github.com/kubernetes/release) repository for details on creating releases and related tools and helper scripts.
 
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