Fix Typo
This pull request **introduces 4 alerts** and **fixes 2** when merging c3eaff2836c80fa495410d35975128e81a5783f1 into 5dc7942ddaa7390c10888dcc5b5b24625d4447eb - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-ff9b11205d6444349936f5cd9ea2c5a196ef4695)

**new alerts:**

* 2 for Unused local variable
* 1 for Signature mismatch in overriding method
* 1 for Unused import

**fixed alerts:**

* 2 for Syntax error