chore: delete deprecated content

[mdrxy]

The following modules, which have been marked for removal, have been deleted. Consequently, any attempt to import these from langchain-classic (which re-exports from langchain-community) will break.

Chat models

• ChatAnthropic (change import to langchain_anthropic.ChatAnthropic)
• AzureChatOpenAI (change import to langchain_openai.AzureChatOpenAI)
• BedrockChat (change import to langchain_aws.ChatBedrock)
• ChatCohere (change import to langchain_cohere.ChatCohere)
• ChatDatabricks (change import to databricks_langchain.ChatDatabricks)
• ChatFireworks (change import to langchain_fireworks.ChatFireworks)
• GigaChat (change import to langchain_gigachat.GigaChat)
• ChatHuggingFace (change import to langchain_huggingface.ChatHuggingFace)
• ChatLiteLLM (change import to langchain_litellm.ChatLiteLLM)
• ChatLiteLLMRouter (change import to langchain_litellm.ChatLiteLLMRouter)
• ChatOllama (change import to langchain_ollama.ChatOllama)
• ChatOpenAI* (change import to langchain_openai.ChatOpenAI)
• ChatPerplexity (change import to langchain_perplexity.ChatPerplexity)
• ChatSambaNovaCloud (change import to langchain_sambanova.ChatSambaNovaCloud)
• ChatSambaStudio (change import to langchain_sambanova.ChatSambaStudio)
• SolarChat (change import to langchain_upstage.ChatUpstage)
• ChatVertexAI (change import to langchain_google_vertexai.ChatVertexAI)
• ChatCloudflareWorkersAI (change import to langchain_cloudflare.ChatCloudflareWorkersAI)
  *ChatOpenAI is kept in this package for now, as many other community chat models inherit from it. It has been removed from __all__ and should not be used. It will be removed at a later date once the other packages can be reconciled.

Chains

• NeptuneSparqlQAChain (change import to langchain_aws.create_neptune_sparql_qa_chain)
• NeptuneOpenCypherQAChain (change import to langchain_aws.create_neptune_opencypher_qa_chain)
• Session property on SQLChatMessageHistory (use session_maker instead)
• connection_string param on SQLChatMessageHistory (use connection instead)

Chat histories

• AstraDBChatMessageHistory (change import to langchain_astradb.AstraDBChatMessageHistory)
• MongoDBChatMessageHistory (change import to langchain_mongodb.MongoDBChatMessageHistory)
• Neo4jChatMessageHistory (change import to langchain_neo4j.Neo4jChatMessageHistory)

Chains

Caches

• AstraDBCache (change import to langchain_astradb.AstraDBCache)
• AstraDBSemanticCache (change import to langchain_astradb.AstraDBSemanticCache)

Retrievers

• QdrantSparseVectorRetriever (change import to langchain_qdrant.QdrantVectorStore#as_retriever())

Vector stores

• Weaviate (change import to langchain_weaviate.WeaviateVectorStore)
• VDMS (change import to langchain_vdms.VDMS)
• Qdrant (change import to langchain_qdrant.Qdrant)
• Pinecone (change import to langchain_pinecone.Pinecone)
• OracleVS (change import to langchain_oracledb.vectorstores.OracleVS)
• Neo4jVector (change import to langchain_neo4j.Neo4jVector)
• MongoDBAtlasVectorSearch (change import to langchain_mongodb.MongoDBAtlasVectorSearch)
• Milvus (change import to langchain_milvus.MilvusVectorStore)*
• MatchingEngine (change import to langchain_google_vertexai.VectorSearchVectorStore)
• DeepLake (change import to langchain_deeplake.DeeplakeVectorStore)
• DatabricksVectorSearch (change import to databricks_langchain.DatabricksVectorSearch)
  *Milvus kept in code for Zilliz usage

Tools

• GooglePlacesTool (change import to langchain_google_community.GooglePlacesTool)
• GoogleSearchResults (change import to langchain_google_community.GoogleSearchResults)
• GoogleSearchRun (change import to langchain_google_community.GoogleSearchRun)

Utilities

• GooglePlacesAPIWrapper (change import to langchain_google_community.GooglePlacesAPIWrapper)
• GoogleSearchAPIWrapper (change import to langchain_google_community.GoogleSearchAPIWrapper)*
• OracleSummary (change import to langchain_oracledb.utilities.OracleSummary)
  *GoogleSearchAPIWrapper kept in code for WebResearchRetriever usage

Other

• GMailLoader (change import to langchain_google_community.GMailLoader)

For any classes that previously imported private methods or utilities from the files containing these classes, those functions have been duplicated into the importing files.