remove flatpak

apps/electron/package.json

@@ -43,27 +43,9 @@
       "category": "public.app-category.social-networking"
     },
     "linux": {
-      "target": ["AppImage", "flatpak"],
+      "target": ["AppImage"],
       "category": "Network;InstantMessaging"
     },
-    "flatpak": {
-      "runtime": "org.freedesktop.Platform",
-      "runtimeVersion": "23.08",
-      "sdk": "org.freedesktop.Sdk",
-      "base": "org.electronjs.Electron2.BaseApp",
-      "baseVersion": "23.08",
-      "finishArgs": [
-        "--share=ipc",
-        "--share=network",
-        "--socket=x11",
-        "--socket=wayland",
-        "--socket=pulseaudio",
-        "--device=dri",
-        "--device=all",
-        "--filesystem=home",
-        "--talk-name=org.freedesktop.Notifications"
-      ]
-    },
     "nsis": {
       "oneClick": true,
       "perMachine": false