Fix superfluous Auto-fixing parser documents (#12062)

Replace this entire comment with:
- **Description:** Fix superfluous [Auto-fixing
parser](https://python.langchain.com/docs/modules/model_io/output_parsers/output_fixing_parser)
docs. Also switching to `langchain.pydantic_v1` from the direct
reference to `pydantic`,
  - **Issue:** N/A,
  - **Dependencies:** N/A,
- **Tag maintainer:** for a quicker response, tag the relevant
maintainer (see below),
  - **Twitter handle:** @dosuken123 

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docs/docs/modules/model_io/output_parsers/output_fixing_parser.mdx

@@ -7,11 +7,9 @@ But we can do other things besides throw errors. Specifically, we can pass the m
 For this example, we'll use the above Pydantic output parser. Here's what happens if we pass it a result that does not comply with the schema:
 
 ```python
-from langchain.prompts import PromptTemplate, ChatPromptTemplate, HumanMessagePromptTemplate
-from langchain.llms import OpenAI
 from langchain.chat_models import ChatOpenAI
 from langchain.output_parsers import PydanticOutputParser
-from pydantic import BaseModel, Field, validator
+from langchain.pydantic_v1 import BaseModel, Field
 from typing import List
 ```