Remove homeassistant.remote (#16099)

* Remove homeassistant.remote

* Use direct import for API

* Fix docstring

homeassistant/helpers/json.py

@@ -0,0 +1,27 @@
+"""Helpers to help with encoding Home Assistant objects in JSON."""
+from datetime import datetime
+import json
+import logging
+
+from typing import Any
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class JSONEncoder(json.JSONEncoder):
+    """JSONEncoder that supports Home Assistant objects."""
+
+    # pylint: disable=method-hidden
+    def default(self, o: Any) -> Any:
+        """Convert Home Assistant objects.
+
+        Hand other objects to the original method.
+        """
+        if isinstance(o, datetime):
+            return o.isoformat()
+        if isinstance(o, set):
+            return list(o)
+        if hasattr(o, 'as_dict'):
+            return o.as_dict()
+
+        return json.JSONEncoder.default(self, o)