refactor: removed unnecessary todo comment, modified jsdoc of utility func (#5164)

server/notification-providers/dingding.js

@@ -87,7 +87,6 @@ class DingDing extends NotificationProvider {
      * @returns {string} Status
      */
     statusToString(status) {
-        // TODO: Move to notification-provider.js to avoid repetition in classes
         switch (status) {
             case DOWN:
                 return "DOWN";

src/util.ts

@@ -120,7 +120,11 @@ export const badgeConstants = {
     defaultCertExpireDownDays: "7"
 };
 
-/** Flip the status of s */
+/**
+ * Flip the status of s between UP and DOWN if this is possible
+ * @param s {number} status
+ * @returns {number} flipped status
+ */
 export function flipStatus(s: number) {
     if (s === UP) {
         return DOWN;