chore: remove uage output

web/app/components/workflow/constants.ts

@@ -325,7 +325,6 @@ export const LLM_OUTPUT_STRUCT: Var[] = [
     variable: 'text',
     type: VarType.string,
   },
-  USAGE,
 ]
 
 export const KNOWLEDGE_RETRIEVAL_OUTPUT_STRUCT: Var[] = [
@@ -333,7 +332,6 @@ export const KNOWLEDGE_RETRIEVAL_OUTPUT_STRUCT: Var[] = [
     variable: 'result',
     type: VarType.arrayObject,
   },
-  USAGE,
 ]
 
 export const TEMPLATE_TRANSFORM_OUTPUT_STRUCT: Var[] = [

web/app/components/workflow/nodes/llm/panel.tsx

@@ -244,11 +244,6 @@ const Panel: FC<NodePanelProps<LLMNodeType>> = ({
               type='string'
               description={t(`${i18nPrefix}.outputVars.output`)}
             />
-            <VarItem
-              name='usage'
-              type='object'
-              description={t(`${i18nPrefix}.outputVars.usage`)}
-            />
           </>
         </OutputVars>
       </div>