### What this PR does / why we need it?
Add `__main__` guard to all offline examples.
- vLLM version: v0.9.2
- vLLM main:
76b494444f
---------
Signed-off-by: shen-shanshan <467638484@qq.com>
V1 is enabled by default, no need to set it by hand now. This PR remove
the useless setting in example and tests
- vLLM version: v0.9.2
- vLLM main:
9ad0a4588b
Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>