Migrate to idiomatic error handling in app/security_update_check.go (#9691)

app/security_update_check.go

@@ -86,10 +86,11 @@ func (a *App) DoSecurityUpdateCheck() {
 				for _, bulletin := range bulletins {
 					if bulletin.AppliesToVersion == model.CurrentVersion {
 						if props["SecurityBulletin_"+bulletin.Id] == "" {
-							if results := <-a.Srv.Store.User().GetSystemAdminProfiles(); results.Err != nil {
+							results := <-a.Srv.Store.User().GetSystemAdminProfiles()
+							if results.Err != nil {
 								mlog.Error("Failed to get system admins for security update information from Mattermost.")
 								return
-							} else {
+							}
 							users := results.Data.(map[string]*model.User)
 
 							resBody, err := http.Get(SECURITY_URL + "/bulletins/" + bulletin.Id)
@@ -109,7 +110,6 @@ func (a *App) DoSecurityUpdateCheck() {
 								mlog.Info(fmt.Sprintf("Sending security bulletin for %v to %v", bulletin.Id, user.Email))
 								a.SendMail(user.Email, utils.T("mattermost.bulletin.subject"), string(body))
 							}
-							}
 
 							bulletinSeen := &model.System{Name: "SecurityBulletin_" + bulletin.Id, Value: bulletin.Id}
 							<-a.Srv.Store.System().Save(bulletinSeen)