diff --git a/litellm/integrations/custom_guardrail.py b/litellm/integrations/custom_guardrail.py
index a94d2c69f..25512716c 100644
--- a/litellm/integrations/custom_guardrail.py
+++ b/litellm/integrations/custom_guardrail.py
@@ -17,11 +17,6 @@ class CustomGuardrail(CustomLogger):
         self.event_hook: Optional[GuardrailEventHooks] = event_hook
         super().__init__(**kwargs)
 
-        # older v1 implementation - not used, just kept for backward compatibility
-        self.moderation_check: Literal["pre_call", "in_parallel"] = kwargs.get(
-            "moderation_check", "pre_call"
-        )
-
     def should_run_guardrail(self, data, event_type: GuardrailEventHooks) -> bool:
         metadata = data.get("metadata") or {}
         requested_guardrails = metadata.get("guardrails") or []