fix: remove type hint

Author: ollz272

python/pydantic_core/core_schema.py

@@ -105,7 +105,7 @@ class CoreConfig(TypedDict, total=False):
     # fields related to float fields only
     allow_inf_nan: bool  # default: True
     # the config options are used to customise serialization to JSON
-    ser_json_timedelta: Literal['iso8601', 'float', 'seconds_float', 'milliseconds_float']  # default: 'iso8601'
+    ser_json_timedelta: Literal['iso8601', 'seconds_float', 'milliseconds_float']  # default: 'iso8601'
     ser_json_bytes: Literal['utf8', 'base64', 'hex']  # default: 'utf8'
     ser_json_inf_nan: Literal['null', 'constants', 'strings']  # default: 'null'
     val_json_bytes: Literal['utf8', 'base64', 'hex']  # default: 'utf8'