Change datepicker library to fix iOS users.

package.json

@@ -32,7 +32,6 @@
     "home-assistant-js-websocket": "^8.0.0",
     "keycharm": "^0.4.0",
     "lit": "^2.3.1",
-    "lit-flatpickr": "^0.4.0",
     "lodash-es": "^4.17.21",
     "masonry-layout": "^4.2.2",
     "moment": "^2.29.4",