Remove start script workaround

Due to the 0.8.0 release with the docker images calling the purpose-built start script, the crypto application has had to add a workaround so it's own jars could be included:

```sh
CLASSPATH="$APP_HOME/lib/*"
```

Once the Deephaven jars are fully published, we should be able to more properly build our own classpath and purpose-built start script and remove the workaround.