remove flatpak

Flatpak support has been a HUGE pain to keep working, the builds take
forever and cost me real money, and there are very few users. Ideally,
we want to just use native system packagers for each distro. I thought
Flatpak would make it easy to support many distros but that ended up
being false.

.github/workflows/release-tip.yml

@@ -11,7 +11,7 @@ name: Release Tip
 jobs:
   tag:
     runs-on: ubuntu-latest
-    needs: [flatpak, build-macos]
+    needs: [build-macos]
     steps:
     - uses: actions/checkout@v4
     - name: Tip Tag
@@ -21,52 +21,6 @@ jobs:
         git tag -fa tip -m "Latest Continuous Release" ${GITHUB_SHA}
         git push --force origin tip
 
-  flatpak:
-    if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}
-    runs-on: ubuntu-latest
-    timeout-minutes: 60
-    container:
-      image: bilelmoussaoui/flatpak-github-actions:gnome-43
-      options: --privileged
-    strategy:
-      fail-fast: false
-      matrix:
-        arch: [x86_64, aarch64]
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        submodules: recursive
-        fetch-depth: 0
-    # Docker is required by the docker/setup-qemu-action which enables emulation
-    - name: Install deps
-      run: |
-        dnf -y install docker
-    - name: Set up QEMU
-      id: qemu
-      uses: docker/setup-qemu-action@v3
-      with:
-        platforms: arm64
-
-    - uses: flatpak/flatpak-github-actions/flatpak-builder@v6
-      with:
-        bundle: ghostty.flatpak
-        manifest-path: com.mitchellh.ghostty.yml
-        branch: tip
-        cache-key: flatpak-builder-${{ matrix.arch }}-${{ github.sha }}-v1
-        arch: ${{ matrix.arch }}
-
-    - name: Rename Bundle
-      run: mv ghostty.flatpak ghostty-${{ matrix.arch }}.flatpak
-    - name: Release
-      uses: softprops/action-gh-release@v1
-      with:
-        name: "Ghostty Tip (\"Nightly\")"
-        prerelease: true
-        tag_name: tip
-        target_commitish: ${{ github.sha }}
-        files: ghostty-${{ matrix.arch }}.flatpak
-        token: ${{ secrets.GH_RELEASE_TOKEN }}
-
   build-macos:
     if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}
     runs-on: macos-12