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

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

tests/models/registry.py

@@ -394,8 +394,6 @@ _TEXT_GENERATION_EXAMPLE_MODELS = {
     ),
     "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(