Fix integration manifest.json

Author: andrewleech

custom_components/uhoo/manifest.json

@@ -8,14 +8,13 @@
   ],
   "config_flow": true,
   "documentation": "https://github.com/andrewleech/uhoo-homeassistant/",
-  "iot_class": "cloud_polling",
   "issue_tracker": "https://github.com/andrewleech/uhoo-homeassistant/issues",
   "requirements": [
       "aiohttp>=3.7.4",
       "click>=8.0.1",
       "pycryptodome>=3.10.1",
       "pyyaml>=6.0",
       "yarl>=1.8.1"
-  ]
+  ],
   "version": "0.0.7"
 }