修复案例更新删除产品概况、基金、投资三个模块数据不生效的bug

src/pages/v2/cases/update.vue

@@ -299,9 +299,9 @@ export default {
       const checkedPro = this.checkFormDetailsNull(form.production_detail)
       const checkedFoud = this.checkFormDetailsNull(form.fund_detail)
       const checkedInvest = this.checkFormDetailsNull(form.invest_detail)
-      if (checkedPro) delete form.production_detail
-      if (checkedFoud) delete form.fund_detail
-      if (checkedInvest) delete form.invest_detail
+      if (checkedPro) form.production_detail = []
+      if (checkedFoud) form.fund_detail = []
+      if (checkedInvest) form.invest_detail = []
       casesApi.updateCase2(this.id, form).then(res => {
         if (res.code === 0) {
           this.$message.success(res.message)