chore(dependencies): remove unused react-datetime (#26688)

Author: rusackas

superset-frontend/package-lock.json

@@ -167,7 +167,6 @@
     "react-ace": "^10.1.0",
     "react-checkbox-tree": "^1.8.0",
     "react-color": "^2.13.8",
-    "react-datetime": "^3.2.0",
     "react-diff-viewer-continued": "^3.2.5",
     "react-dnd": "^11.1.3",
     "react-dnd-html5-backend": "^11.1.3",