Remove accelerate dependency from requirements.txt

- Streamline project dependencies
- Remove unnecessary accelerate library
- Maintain minimal and focused requirements configuration

requirements.txt

@@ -6,5 +6,4 @@ langchain
 langchain-huggingface
 langchain-core
 langgraph > 0.2.27
-python-dotenv
-accelerate>=0.26.0
+python-dotenv