Revert "fix(cache-dit): add step guard to prevent sao scm crash during warmup"

This reverts commit e4c5a1f.

Author: akshatvishu

vllm_omni/diffusion/cache/cache_dit_backend.py

@@ -395,11 +395,7 @@ def refresh_cache_context(pipeline: Any, num_inference_steps: int, verbose: bool
             num_inference_steps: New number of inference steps.
             verbose: Whether to log refresh operations.
         """
-        scm_policy = cache_config.get("scm_steps_mask_policy")
-        is_supported_scm_step = num_inference_steps >= 8 or num_inference_steps in (4, 6)
-        use_scm = scm_policy is not None and is_supported_scm_step
-
-        if not use_scm:
+        if cache_config.scm_steps_mask_policy is None:
             cache_dit.refresh_context(pipeline.transformer, num_inference_steps=num_inference_steps, verbose=verbose)
         else:
             cache_dit.refresh_context(