revert: https://github.com/langgenius/dify/pull/18554 (#19787)

web/app/components/workflow/nodes/variable-assigner/default.ts

@@ -1,7 +1,5 @@
-import type { Var } from '../../types'
 import { type NodeDefault, VarType } from '../../types'
 import { BlockEnum } from '../../types'
-import { getNotExistVariablesByArray } from '../../utils/workflow'
 import type { VariableAssignerNodeType } from './types'
 import { ALL_CHAT_AVAILABLE_BLOCKS, ALL_COMPLETION_AVAILABLE_BLOCKS } from '@/app/components/workflow/blocks'
 
@@ -56,18 +54,6 @@ const nodeDefault: NodeDefault<VariableAssignerNodeType> = {
       errorMessage: errorMessages,
     }
   },
-  checkVarValid(payload: VariableAssignerNodeType, varMap: Record<string, Var>, t: any) {
-    const errorMessageArr: string[] = []
-    const variables_warnings = getNotExistVariablesByArray(payload.variables ?? [], varMap)
-    if (variables_warnings.length)
-      errorMessageArr.push(`${t('workflow.nodes.variableAssigner.title')} ${t('workflow.common.referenceVar')}${variables_warnings.join('、')}${t('workflow.common.noExist')}`)
-
-    return {
-      isValid: true,
-      warning_vars: variables_warnings,
-      errorMessage: errorMessageArr,
-    }
-  },
 }
 
 export default nodeDefault