Revert "Guard Qwen3VL imports with try/except in transformers_models.py"

This reverts commit 10038f0.

Author: hychiang-git

tests/_test_utils/torch/transformers_models.py

@@ -32,16 +32,11 @@
     PreTrainedModel,
     Qwen3Config,
     Qwen3MoeConfig,
+    Qwen3VLConfig,
     T5Config,
     T5ForConditionalGeneration,
 )
-
-try:
-    from transformers import Qwen3VLConfig
-    from transformers.models.qwen3_vl.modeling_qwen3_vl import Qwen3VLForConditionalGeneration
-except ImportError:
-    Qwen3VLConfig = None  # type: ignore[assignment,misc]
-    Qwen3VLForConditionalGeneration = None  # type: ignore[assignment,misc]
+from transformers.models.qwen3_vl.modeling_qwen3_vl import Qwen3VLForConditionalGeneration
 
 import modelopt.torch.opt as mto
 
@@ -130,8 +125,6 @@ def create_tiny_qwen3_moe_dir(
 
 ##### Qwen3-VL #####
 def get_tiny_qwen3vl(**config_kwargs) -> PreTrainedModel:
-    if Qwen3VLConfig is None:
-        pytest.skip("transformers does not have Qwen3VL support")
     set_seed(SEED)
 
     # Defaults: hidden_size=num_attention_heads*head_dim (e.g. 4*8=32).