### What this PR does / why we need it?
`stateless_init_dp_group` in vllm works with non-cuda platform now.
Remove this useless patch.
Which was introduced in vllm-ascend by
e74331a1ed
(v0.8.4rc2)
vLLM upstream merged:
3e472d882a
(v0.8.0)
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
CI passed
Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>