Remove integration_type from manifest.json

Although the devices work after adding this, the integration no longer shows up in the integrations menu, so configurations cannot be edited.  Will need to make this change after 2022.11 is released.

custom_components/tuya_local/manifest.json

@@ -1,6 +1,5 @@
 {
     "domain": "tuya_local",
-    "integration_type": "device",
     "iot_class": "local_polling",
     "name": "Tuya Local",
     "version": "0.20.1",