core[patch]: Remove default BaseModel init docstring (#25009)

Currently a default init docstring gets appended to the class docstring
of every BaseModel inherited object. This removes the default init
docstring.

![Screenshot 2024-08-02 at 5 09 55
PM](https://github.com/user-attachments/assets/757fe4ae-a793-4e7d-8354-512de2c06818)

libs/core/langchain_core/load/serializable.py

@@ -107,6 +107,11 @@ class Serializable(BaseModel, ABC):
         as part of the serialized representation.
     """
 
+    # Remove default BaseModel init docstring.
+    def __init__(self, *args: Any, **kwargs: Any) -> None:
+        """"""
+        super().__init__(*args, **kwargs)
+
     @classmethod
     def is_lc_serializable(cls) -> bool:
         """Is this class serializable?