B4 leftovers
This pull request **introduces 1 alert** and **fixes 2** when merging d285219e23c779109783e6db98f856ccf20730c6 into d7ad10435e97024c7c9fdbdd4228e0011dc9e432 - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-b278125132b6fe7b7e4bf372a40fa8d12c683374)

**new alerts:**

* 1 for Unused import

**fixed alerts:**

* 2 for Unused import This pull request **introduces 1 alert** and **fixes 2** when merging 331c9d4e2b693d48c8ec024576ee34aab65672a4 into eff003635f6d7c4fbb1be4f46b747db63b58cd34 - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-d3c05e91e5cd8e8107cc690ddd36c5c7a8aac545)

**new alerts:**

* 1 for Unused import

**fixed alerts:**

* 2 for Unused import
Integrating last couple of PRs that went into b4.