Update pipeline.py

pipeline.py

@@ -187,10 +187,9 @@ CACHE_SIZE_LIMIT = 1000
 # except Exception as e:
 #     logger.error(f"Failed to initialize ChatGroq: {e}")
 #     raise RuntimeError("ChatGroq initialization failed.") from e
-from langchain.cache import BaseCache
 
-# Define a no-op cache that does nothing
-class NoOpCache(BaseCache):
+# Define a minimal no-op cache class
+class NoOpCache:
     def lookup(self, key: str):
         return None  # Always return None, meaning no cache hit