Fastspeech2
This pull request **introduces 2 alerts** when merging 51ac7df55e15ff6e742b6761ef5ee336208f4c94 into 97b1c96b64a64ebd45ca75409347bcf5514c0fb9 - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-832bc76fc446076c1c275776064deb558da6fc7e)

**new alerts:**

* 2 for Unused import