[diffusion] chore: remove stepvideo code (#15918)

python/sglang/multimodal_gen/registry.py

@@ -18,7 +18,6 @@ from sglang.multimodal_gen.configs.pipeline_configs import (
     FastHunyuanConfig,
     FluxPipelineConfig,
     HunyuanConfig,
-    StepVideoT2VConfig,
     WanI2V480PConfig,
     WanI2V720PConfig,
     WanT2V480PConfig,
@@ -50,7 +49,6 @@ from sglang.multimodal_gen.configs.sample.qwenimage import (
     QwenImageLayeredSamplingParams,
     QwenImageSamplingParams,
 )
-from sglang.multimodal_gen.configs.sample.stepvideo import StepVideoT2VSamplingParams
 from sglang.multimodal_gen.configs.sample.wan import (
     FastWanT2V480PConfig,
     Wan2_1_Fun_1_3B_InP_SamplingParams,
@@ -312,16 +310,6 @@ def _register_configs():
         ],
     )
 
-    # StepVideo
-    register_configs(
-        sampling_param_cls=StepVideoT2VSamplingParams,
-        pipeline_config_cls=StepVideoT2VConfig,
-        hf_model_paths=[
-            "FastVideo/stepvideo-t2v-diffusers",
-        ],
-        model_detectors=[lambda hf_id: "stepvideo" in hf_id.lower()],
-    )
-
     # Wan
     register_configs(
         sampling_param_cls=WanT2V_1_3B_SamplingParams,