Validation Error

### System Info

Python Version: 3.9.11
Langchain version = 0.0.199

I'm getting a validation error with GPT4All where I'm following the instructions of the notebook and installed all packages but apparently there's some parameters called n_parts that isn't part of the GPT4All attribute

```
from langchain import PromptTemplate, LLMChain
from langchain.llms import GPT4All
from langchain.callbacks.streaming_stdout import StreamingStdOutCallbackHandler
import requests

from pathlib import Path
from tqdm import tqdm

Path(local_path).parent.mkdir(parents=True, exist_ok=True)

url = 'http://gpt4all.io/models/ggml-gpt4all-l13b-snoozy.bin'


response = requests.get(url, stream=True)


with open(local_path, 'wb') as f:
    for chunk in tqdm(response.iter_content(chunk_size=8192)):
        if chunk:
            f.write(chunk)
template = """Question: {question}

Answer: Let's think step by step."""

prompt = PromptTemplate(template=template, input_variables=["question"])



callbacks = [StreamingStdOutCallbackHandler()]

llm = GPT4All(model=local_path, callbacks=callbacks, verbose=True)


llm = GPT4All(model=local_path, backend='gptj', callbacks=callbacks, verbose=True)
llm_chain = LLMChain(prompt=prompt, llm=llm)
question = "What NFL team won the Super Bowl in the year Justin Bieber was born?"

llm_chain.run(question)
```

and this is the error I get

```
Exception ignored in: <function Model.__del__ at 0x2aaaed28aa60>
Traceback (most recent call last):
  File "/home/traney/.conda/envs/openai/lib/python3.9/site-packages/pyllamacpp/model.py", line 402, in __del__
    if self._ctx:
AttributeError: 'GPT4All' object has no attribute '_ctx'
Exception ignored in: <function Model.__del__ at 0x2aaaed28aa60>
Traceback (most recent call last):
  File "/home/traney/.conda/envs/openai/lib/python3.9/site-packages/pyllamacpp/model.py", line 402, in __del__
    if self._ctx:
AttributeError: 'GPT4All' object has no attribute '_ctx'
---------------------------------------------------------------------------
ValidationError                           Traceback (most recent call last)
Cell In[31], line 11
      9 callbacks = [StreamingStdOutCallbackHandler()]
     10 # Verbose is required to pass to the callback manager
---> 11 llm = GPT4All(model=local_path, callbacks=callbacks, verbose=True)
     12 # If you want to use a custom model add the backend parameter
     13 # Check https://docs.gpt4all.io/gpt4all_python.html for supported backends
     14 llm = GPT4All(model=local_path, backend='gptj', callbacks=callbacks, verbose=True)

File ~/.conda/envs/openai/lib/python3.9/site-packages/pydantic/main.py:341, in pydantic.main.BaseModel.__init__()

ValidationError: 1 validation error for GPT4All
__root__
  __init__() got an unexpected keyword argument 'n_parts' (type=type_error)
```
I installed all relevant packages and checked the previous reports for these issues but I just get different errors from not being able to find the model, to validation error to GPT4All not existing. Is there any new things I have to do to implement GPT4All on langchain?

### Who can help?

_No response_

### Information

- [X] The official example notebooks/scripts
- [ ] My own modified scripts

### Related Components

- [X] LLMs/Chat Models
- [ ] Embedding Models
- [X] Prompts / Prompt Templates / Prompt Selectors
- [ ] Output Parsers
- [ ] Document Loaders
- [ ] Vector Stores / Retrievers
- [ ] Memory
- [ ] Agents / Agent Executors
- [X] Tools / Toolkits
- [ ] Chains
- [ ] Callbacks/Tracing
- [ ] Async

### Reproduction

Follow code above in Jupyter Notebook

### Expected behavior

the chat model should answer the question