Untrack flatpak_backup folder and ignore it locally

.gitignore

@@ -48,3 +48,6 @@ org.kde.bearwave.desktop
 
 ## OS noise
 .DS_Store
+
+## Local Flatpak backup
+flatpak_backup/

flatpak_backup/de.nerdbear.bearwave.json

@@ -1,30 +0,0 @@
-{
-    "app-id": "de.nerdbear.bearwave",
-    "runtime": "org.kde.Platform",
-    "runtime-version": "6.10",
-    "sdk": "org.kde.Sdk",
-    "command": "bearwave",
-    "finish-args": [
-        "--share=network",
-        "--socket=wayland",
-        "--socket=fallback-x11",
-        "--socket=pulseaudio",
-        "--own-name=org.mpris.MediaPlayer2.bearwave",
-        "--talk-name=org.freedesktop.Notifications",
-        "--talk-name=org.kde.StatusNotifierWatcher",
-        "--share=ipc"
-    ],
-    "modules": [
-        {
-            "name": "bearwave",
-            "buildsystem": "cmake-ninja",
-            "builddir": true,
-            "sources": [
-                {
-                    "type": "dir",
-                    "path": "."
-                }
-            ]
-        }
-    ]
-}