ci/playwright: remove man-db hack

This has been fixed upstream.  See:

* https://github.com/actions/runner-images/releases/tag/ubuntu24%2F20251102.99
* https://github.com/actions/runner-images/releases/tag/ubuntu22%2F20251112.150
* https://github.com/actions/runner-images/releases/tag/ubuntu24%2F20251112.124

Author: alxndrsn

.github/actions/install-playwright/action.yml

@@ -5,8 +5,5 @@ runs:
   using: composite
 
   steps:
-    # workaround for #9127
-    - run: sudo apt-get remove --purge man-db
-      shell: bash
     - run: sudo npx playwright install-deps
       shell: bash