don't build snap nix or flatpak

.github/workflows/build.yml

@@ -515,76 +515,3 @@ jobs:
         shell: msys2 {0}
         run: |
           ccache -s
-
-  snap:
-    runs-on: ubuntu-20.04
-    steps:
-      - name: Checkout
-        if: inputs.build_type == 'Debug'
-        uses: actions/checkout@v3
-        with:
-          submodules: 'true'
-      - name: Set short version
-        shell: bash
-        if: inputs.build_type == 'Debug'
-        run: |
-          ver_short=`git rev-parse --short HEAD`
-          echo "VERSION=$ver_short" >> $GITHUB_ENV
-      - name: Package Snap (Linux)
-        id: snapcraft
-        if: inputs.build_type == 'Debug'
-        uses: snapcore/action-build@v1
-      - name: Upload Snap (Linux)
-        if: inputs.build_type == 'Debug'
-        uses: actions/upload-artifact@v3
-        with:
-          name: pollymc_${{ env.VERSION }}_amd64.snap
-          path: ${{ steps.snapcraft.outputs.snap }}
-
-  flatpak:
-    runs-on: ubuntu-latest
-    container:
-      image: bilelmoussaoui/flatpak-github-actions:kde-5.15-22.08
-      options: --privileged
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-        if: inputs.build_type == 'Debug'
-        with:
-          submodules: 'true'
-      - name: Build Flatpak (Linux)
-        if: inputs.build_type == 'Debug'
-        uses: flatpak/flatpak-github-actions/flatpak-builder@v5
-        with:
-          bundle: "PollyMC.flatpak"
-          manifest-path: flatpak/org.fn2006.PollyMC.yml 
-
-  nix:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        package:
-          - pollymc
-          - pollymc-qt5
-    steps:
-      - name: Clone repository
-        if: inputs.build_type == 'Debug'
-        uses: actions/checkout@v3
-        with:
-          submodules: 'true'
-      - name: Install nix
-        if: inputs.build_type == 'Debug'
-        uses: cachix/install-nix-action@v18
-        with:
-          install_url: https://nixos.org/nix/install
-          extra_nix_config: |
-            auto-optimise-store = true
-            experimental-features = nix-command flakes
-      - uses: cachix/cachix-action@v12
-        if: inputs.build_type == 'Debug'
-        with:
-          name: pollymc
-          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-      - name: Build
-        if: inputs.build_type == 'Debug'
-        run: nix build .#${{ matrix.package }} --print-build-logs