Fix LTX2 channels-last review scope

Signed-off-by: Hongsheng Liu <liuhongsheng4@huawei.com>

tests/entrypoints/test_async_omni_diffusion_config.py

@@ -20,7 +20,7 @@ def test_default_stage_config_includes_cache_backend():
             "cache_backend": "cache_dit",
             "cache_config": '{"Fn_compute_blocks": 2}',
             "vae_use_slicing": True,
-            "vae_use_channels_last_3d": True,
+            "extras": {"ltx2_use_channels_last_3d": True},
             "ulysses_degree": 2,
         }
     )[0]
@@ -30,7 +30,7 @@ def test_default_stage_config_includes_cache_backend():
     assert engine_args["cache_backend"] == "cache_dit"
     assert engine_args["cache_config"]["Fn_compute_blocks"] == 2
     assert engine_args["vae_use_slicing"] is True
-    assert engine_args["vae_use_channels_last_3d"] is True
+    assert engine_args["extras"]["ltx2_use_channels_last_3d"] is True
     assert engine_args["parallel_config"].ulysses_degree == 2
     assert engine_args["model_stage"] == "diffusion"
 
@@ -373,25 +373,6 @@ def test_serve_cli_accepts_diffusion_compile_controls():
     assert stage_cfg["engine_args"]["diffusion_compile_dynamic"] is False
 
 
-def test_serve_cli_accepts_vae_channels_last_3d_opt_in():
-    parser = TrackingArgumentParser()
-    subparsers = parser.add_subparsers(dest="command")
-    OmniServeCommand().subparser_init(subparsers)
-    args = parser.parse_args(
-        [
-            "serve",
-            "Lightricks/LTX-2",
-            "--omni",
-            "--vae-use-channels-last-3d",
-        ]
-    )
-
-    stage_cfg = AsyncOmniEngine._create_default_diffusion_stage_cfg(args.get_explicit_kwargs_dict())[0]
-
-    assert args.vae_use_channels_last_3d is True
-    assert stage_cfg["engine_args"]["vae_use_channels_last_3d"] is True
-
-
 def test_serve_cli_accepts_diffusion_attention_backend():
     """Ensure diffusion serve CLI exposes the shorthand backend flag."""
     parser = TrackingArgumentParser()