feat(settings): 移除单位美元额度设置项，为后续修改作准备

web/src/pages/Setting/Operation/SettingsGeneral.jsx

@@ -130,6 +130,7 @@ export default function GeneralSettings(props) {
                   showClear
                 />
               </Col>
+              {inputs.QuotaPerUnit !== '500000' && inputs.QuotaPerUnit !== 500000 && (
                 <Col xs={24} sm={12} md={8} lg={8} xl={8}>
                   <Form.Input
                     field={'QuotaPerUnit'}
@@ -141,6 +142,7 @@ export default function GeneralSettings(props) {
                     onClick={() => setShowQuotaWarning(true)}
                   />
                 </Col>
+              )}
               <Col xs={24} sm={12} md={8} lg={8} xl={8}>
                 <Form.Input
                   field={'USDExchangeRate'}