Drop 0.11.0 support (#4377)

There is a lot hack code for v0.11.0, which makes the code hard to
upgrade to newer vLLM version. Since v0.11.0 will release soon. Let's
drop v0.11.0 support first. Then we'll upgrade to v0.11.2 soon.


- vLLM version: v0.11.0
- vLLM main:
2918c1b49c

Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>

tests/e2e/conftest.py

@@ -45,6 +45,7 @@ from vllm.inputs import TextPrompt
 from vllm.outputs import RequestOutput
 from vllm.platforms import current_platform
 from vllm.transformers_utils.utils import maybe_model_redirect
+from vllm.utils.network_utils import get_open_port
 
 from tests.e2e.model_utils import (TokensTextLogprobs,
                                    TokensTextLogprobsPromptLogprobs)
@@ -54,12 +55,6 @@ from vllm_ascend.ascend_config import clear_ascend_config
 # we not explicitly patch here, some of them might be effectiveless
 # in pytest scenario
 from vllm_ascend.utils import adapt_patch  # noqa E402
-from vllm_ascend.utils import vllm_version_is
-
-if vllm_version_is("0.11.0"):
-    from vllm.utils import get_open_port
-else:
-    from vllm.utils.network_utils import get_open_port
 
 adapt_patch(True)
 adapt_patch(False)