Cleaning up a repo

We use a lot of smaller modular keywordtests in our main testcases. Some of these modular testcases are no longer in use.

Is there any way to trace which keywordtests are used as a part of another keywordtest, and which ones can be deleted?

The same goes for our checkpoints. We know we don't use all of them, but we are not sure which ones we can safely delete, since we cannot find a way tracing where they are used.