fix imports

Author: sentrivana

scripts/populate_tox/config.py

@@ -202,6 +202,7 @@
             "*": ["openai", "tiktoken", "langchain-openai"],
             "<=0.1": ["httpx<0.28.0"],
             ">=0.3": ["langchain-community"],
+            ">=1.0": ["langchain-classic"],
         },
         "python": {
             "<1.0": "<3.14",  # https://github.com/langchain-ai/langchain/issues/33449#issuecomment-3408876631