chore: remove unused pinia dep

Signed-off-by: Peter Ringelmann <peter.ringelmann@nextcloud.com>

Author: pringelmann

package-lock.json

@@ -44,7 +44,6 @@
     "debounce": "^3.0.0",
     "markdown-it": "^14.1.1",
     "p-queue": "^9.1.0",
-    "pinia": "^3.0.4",
     "qrcode": "^1.5.4",
     "vue": "^3.5.22",
     "vue-draggable-plus": "^0.6.1",