diff --git a/vllm/attention/backends/placeholder_attn.py b/vllm/attention/backends/placeholder_attn.py
index b444349d152a4..888adbffb8578 100644
--- a/vllm/attention/backends/placeholder_attn.py
+++ b/vllm/attention/backends/placeholder_attn.py
@@ -114,10 +114,6 @@ class PlaceholderAttentionMetadata(AttentionMetadata):
     _cached_prefill_metadata: Optional["PlaceholderAttentionMetadata"] = None
     _cached_decode_metadata: Optional["PlaceholderAttentionMetadata"] = None
 
-    def advance_step(self, *args, **kwargs):
-        # No need to do anything here
-        pass
-
     @property
     def prefill_metadata(self) -> Optional["PlaceholderAttentionMetadata"]:
         if self.num_prefills == 0:
diff --git a/vllm/worker/multi_step_model_runner.py b/vllm/worker/multi_step_model_runner.py
index e08a61e31fe42..3ca0d88a42183 100644
--- a/vllm/worker/multi_step_model_runner.py
+++ b/vllm/worker/multi_step_model_runner.py
@@ -29,9 +29,7 @@
 
 logger = init_logger(__name__)
 
-MULTI_STEP_ATTENTION_BACKENDS = [
-    "FLASH_ATTN", "ROCM_FLASH", "FLASHINFER", "NO_ATTENTION"
-]
+MULTI_STEP_ATTENTION_BACKENDS = ["FLASH_ATTN", "ROCM_FLASH", "FLASHINFER"]
 MULTI_STEP_CHUNKED_PREFILL_ATTENTION_BACKENDS = ["FLASH_ATTN"]
 
 def _get_supported_attention_backends(chunked_prefill_enabled: bool) \