Changes in embedding.py, phrase.py, symbol.py, word.py

Removed deprecated value

anansyTypes/structures/symbol.py

@@ -24,6 +24,6 @@ class Symbol:
         return core_schema.json_or_python_schema(
             python_schema=handler(cls),
             json_schema=core_schema.plain_serializer_function_ser_schema(
-                serialize, return_type=dict, when_used="json"
+                serialize, when_used="json"
             ),
         )