remove tables headers when there is no enroll devices in the system

components/mobile-plugins/mobile-base-plugin/org.wso2.carbon.device.mgt.mobile.ui/src/main/resources/jaggeryapps/devicemgt/app/pages/mdm.page.devices/public/js/device-listing.js

@@ -450,6 +450,7 @@ function initPage() {
                     loadDevices();
                 } else {
                     $("#loading-content").remove();
+                    $("#device-table").remove();
                     $("#device-listing-status-msg").text("No enrolled device is found.");
                     $("#device-listing-status").removeClass(' hidden');
                 }