chore: no need to install flatpak anymore ig

Author: vixalien

.github/workflows/ci.yaml

@@ -16,10 +16,6 @@ jobs:
       image: bilelmoussaoui/flatpak-github-actions:gnome-nightly
       options: --privileged
     steps:
-      - name: Install Flatpak
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y flatpak
       - name: Add Flatpak remotes
         run: |
           flatpak --system remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo