Fix inconsistent subgraphNode usage (#4688)

src/utils/executionUtil.ts

@@ -3,11 +3,7 @@ import type {
   ExecutionId,
   LGraph
 } from '@comfyorg/litegraph'
-import {
-  ExecutableNodeDTO,
-  LGraphEventMode,
-  SubgraphNode
-} from '@comfyorg/litegraph'
+import { ExecutableNodeDTO, LGraphEventMode } from '@comfyorg/litegraph'
 
 import type {
   ComfyApiWorkflow,
@@ -63,12 +59,7 @@ export const graphToPrompt = async (
   for (const node of graph.computeExecutionOrder(false)) {
     const dto: ExecutableLGraphNode = isGroupNode(node)
       ? new ExecutableGroupNodeDTO(node, [], nodeDtoMap)
-      : new ExecutableNodeDTO(
-          node,
-          [],
-          nodeDtoMap,
-          node instanceof SubgraphNode ? node : undefined
-        )
+      : new ExecutableNodeDTO(node, [], nodeDtoMap)
 
     for (const innerNode of dto.getInnerNodes()) {
       nodeDtoMap.set(innerNode.id, innerNode)