Restore PlaMo2 unit test as pfnet/plamo-2-1b now supports transformers >=4.56 (vllm-project#28019)

Signed-off-by: Shinichi Hemmi <50256998+Alnusjaponica@users.noreply.github.com>

Author: Alnusjaponica

tests/models/registry.py

@@ -394,8 +394,6 @@ def check_available_online(
  ),
  "Plamo2ForCausalLM": _HfExamplesInfo(
  "pfnet/plamo-2-1b",
- max_transformers_version="4.55.4",
- transformers_version_reason="HF model uses remote code that is not compatible with latest Transformers", # noqa: E501
  trust_remote_code=True,
  ),
  "QWenLMHeadModel": _HfExamplesInfo(