Remove version requirements to let pip manage dependencies

requirements.txt

@@ -1,7 +1,7 @@
-smolagents==1.9.2
-gradio>=3.50.0
-pyyaml>=6.0
-pytz>=2023.3
-requests>=2.31.0
-huggingface_hub>=0.19.0
-pillow>=11.0.0 
+smolagents
+gradio
+pyyaml
+pytz
+requests
+huggingface_hub
+pillow