remove flatpak again

#2393
https://github.com/flathub/no.mifi.losslesscut/issues/84#issuecomment-3654854957

.github/workflows/build.yml

@@ -70,13 +70,6 @@ jobs:
         uses: samuelmeuli/action-snapcraft@v2
         if: startsWith(matrix.os, 'ubuntu')
       
-      - name: (Linux) Setup flatpak
-        if: startsWith(matrix.os, 'ubuntu')
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y flatpak flatpak-builder
-          flatpak --user remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
-
       - name: Save provisioning profile
         if: startsWith(matrix.os, 'macos')
         env:
@@ -176,6 +169,5 @@ jobs:
             dist/LosslessCut-linux-arm64.tar.bz2
             dist/LosslessCut-linux-armv7l.tar.bz2
             dist/LosslessCut-linux-x64.tar.bz2
-            dist/LosslessCut-linux-x86_64.flatpak
             screenshot.jpeg
 

package.json

@@ -452,10 +452,6 @@
           "arch": "x64",
           "target": "snap"
         },
-        {
-          "arch": "x64",
-          "target": "flatpak"
-        },
         {
           "arch": "arm64",
           "target": "tar.bz2"
@@ -471,22 +467,6 @@
         "default",
         "removable-media"
       ]
-    },
-    "flatpak": {
-      "runtime": "org.freedesktop.Platform",
-      "runtimeVersion": "23.08",
-      "sdk": "org.freedesktop.Sdk",
-      "base": "org.electronjs.Electron2.BaseApp",
-      "baseVersion": "23.08",
-      "finishArgs": [
-        "--share=network",
-        "--socket=x11",
-        "--socket=wayland",
-        "--device=dri",
-        "--socket=pulseaudio",
-        "--filesystem=home",
-        "--talk-name=org.freedesktop.Notifications"
-      ]
     }
   },
   "packageManager": "yarn@4.11.0"