Hide the handler

[ddgenome]

We are currently between the rug 0.12.0 and 0.13.0 releases in a sense. The latest CLI only supports 0.13.0 but the bot/runner only supports 0.12.0. We cannot update the handler in this repo until the bot/runner gets updated, but that handler will not compile using the latest CLI. We need to hide the sample handler in this repo so it does not get picked up by the CLI when it is compiling things.