Modify ci.yml

Author: vboutrou

.github/workflows/ci.yml

@@ -24,7 +24,6 @@ jobs:
         if: ${{ always() }}
         run: |
           sudo apt-get install xvfb
-          sudo apt install gstreamer1.0-plugins-*
           Xvfb :99 &
           echo "DISPLAY=:99" >> $GITHUB_ENV