Revert "Install git pre-commit hooks in the vm as part of provisioning."

This reverts commit b3aa3b44de198abea49f5b43e2403f466f30f66c.

The hook was actually being installed through the bind-mount into the
checkout outside the VM.

(imported from commit 7fcb4806743508e530b46593a1022ea00b74259e)

provision.py

@@ -162,7 +162,6 @@ def main():
     sh.do_destroy_rebuild_database(**LOUD)
     sh.postgres_init_test_db(**LOUD)
     sh.do_destroy_rebuild_test_database(**LOUD)
-    sh.setup_git_repo(**LOUD)
 
 if __name__ == "__main__":
     sys.exit(main())