remove review team from conda lock generation GH workflow

[valeriupredoi]

Description

The conda lock generation GH Actions workflow always fails at a silly final step (assigning a review team), see eg https://github.com/valeriupredoi/PyActiveStorage/actions/runs/7598907531/job/20695385388 - this is not needed in any shape or form, I am the reviewer, and even if I am on hols, we avoid sending blanket messages to teams for this particular review.

Before you get started

• [ ] ☝ Create an issue to discuss what you are going to do

Checklist

• This pull request has a descriptive title and labels
• This pull request has a minimal description (most was discussed in the issue, but a two-liner description is still desirable)
• Unit tests have been added (if codecov test fails)
• Any changed dependencies have been added or removed correctly (if need be)
• All tests pass