Remove a link to an unmaintained project

Fixes #822

PiperOrigin-RevId: 472563830

Author: cushon

README.md

@@ -79,9 +79,6 @@ Implementation`.
         pre-commit git hook.
 *   SBT plugins
     *   [sbt/sbt-java-formatter](https://github.com/sbt/sbt-java-formatter)
-*   [maltzj/google-style-precommit-hook](https://github.com/maltzj/google-style-precommit-hook):
-    A pre-commit (pre-commit.com) hook that will automatically run GJF whenever
-    you commit code to your repository
 *   [Github Actions](https://github.com/features/actions)
     *   [googlejavaformat-action](https://github.com/axel-op/googlejavaformat-action):
         Automatically format your Java files when you push on github