not use isRetrieving

src/client/js/services/AdminAppContainer.js

@@ -78,7 +78,6 @@ export default class AdminAppContainer extends Container {
       const { appSettingsParams } = response.data;
 
       this.setState({
-        isRetrieving: false,
         title: appSettingsParams.title,
         confidential: appSettingsParams.confidential,
         globalLang: appSettingsParams.globalLang,

src/client/js/services/AdminMarkDownContainer.js

@@ -48,7 +48,6 @@ export default class AdminMarkDownContainer extends Container {
       const { markdownParams } = response.data;
 
       this.setState({
-        isRetrieving: false,
         isEnabledLinebreaks: markdownParams.isEnabledLinebreaks,
         isEnabledLinebreaksInComments: markdownParams.isEnabledLinebreaksInComments,
         pageBreakSeparator: markdownParams.pageBreakSeparator,

src/client/js/services/AdminNotificationContainer.js

@@ -18,7 +18,6 @@ export default class AdminNotificationContainer extends Container {
     this.appContainer = appContainer;
 
     this.state = {
-      isRetrieving: true,
       retrieveError: null,
       selectSlackOption: 'Incoming Webhooks',
       webhookUrl: '',