Temporarily remove openai dependency from requirements-tool_bench

Author: openingnow

requirements/requirements-tool_bench.txt

@@ -3,7 +3,6 @@ pytest~=8.3.3
 huggingface_hub>=0.34.0,<1.0
 matplotlib~=3.10.0
 numpy~=1.26.4
-openai~=1.55.3
 pandas~=2.2.3
 prometheus-client~=0.20.0
 requests~=2.32.3