Update requirements.txt

requirements.txt

@@ -1,9 +1,8 @@
 langchain>=1.0.0
 langgraph>=1.0.0
 langchain-chroma>=0.1.0
-langchain-qdrant>=0.1.0
 langchain-ollama>=0.1.0
 langchain-tavily>=0.1.0
 langchain-text-splitters>=0.1.0
-python-dotenv>=1.0.0
-pydantic>=2.0.0
+chromadb>=0.4.0
+python-dotenv>=1.0.0