chore: remove old man-db step

this was fixed upstream actions/runner-images#10977

Author: ThisAMJ

.github/workflows/CI.yaml

@@ -34,14 +34,6 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with: { fetch-depth: 0 }
-      - name: Disable man-db triggers
-        run: |
-          # https://github.com/communitiesuk/funding-service/pull/839
-          # https://github.com/actions/runner-images/issues/10977
-          # Disables man-db triggers, which have been a cause of huge (but variable) delays in github action jobs
-          # completing; we're seeing pauses on this step of 120+ seconds in some rare cases.
-          echo "set man-db/auto-update false" | sudo debconf-communicate
-          sudo dpkg-reconfigure man-db
       - name: Install Dependencies
         run: sudo apt-get install -y g++ qt6-base-dev
       - name: Build