langchain

09c2d8fa - langchain_openai: Cleanup OpenAIEmbeddings validate_environment. (#25855)

langchain_openai: Cleanup OpenAIEmbeddings validate_environment. (#25855) **Description:** [This portion of code](https://github.com/langchain-ai/langchain/blob/v0.1.16/libs/partners/openai/langchain_openai/embeddings/base.py#L189-L196) has no use as a couple lines later a [`ValueError` is thrown](https://github.com/langchain-ai/langchain/blob/v0.1.16/libs/partners/openai/langchain_openai/embeddings/base.py#L209-L213). **Issue:** A follow up to #25852.