Remove unnecessary ufmt install in github actions

[Balandat]

Summary: The line pip install -r requirements-fmt.txt above already installs ufmt, so this is not needed.

Differential Revision: D64517856

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D64517856

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.98%. Comparing base (7daad68) to head (80c0a7f). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2583 +/- ## ======================================= Coverage 99.98% 99.98% ======================================= Files 196 196 Lines 17333 17333 ======================================= Hits 17331 17331 Misses 2 2 ```

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[facebook-github-bot]

This pull request has been merged in pytorch/botorch@b6726266d5c878f706b2d4072a3c7aa9ab487882.