chore: remove news feed feature (#17)

## Summary

- Removes the hourly RSS news posting scheduler and `postNews` module
- Removes the `rss.ts` interface and `lastRssItems` tracking from the `Amari` interface and bot initialisation
- Removes the `news` channel ID from `ids.ts`
- Removes the `rss-parser` dependency

✨ This PR was created with help from Hikari~ 🌸

Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Reviewed-on: #17
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

src/index.ts

@@ -21,7 +21,6 @@ import { checkRetroAchievements } from "./modules/checkAchievements.js";
 import { getForumTagId } from "./modules/getForumTagId.js";
 import { logMenteeJoin } from "./modules/logMenteeJoin.js";
 import { logMenteeLeave } from "./modules/logMenteeLeave.js";
-import { postFreeCodeCampNews, postHackerNews } from "./modules/postNews.js";
 import { postProgressReminders } from "./modules/postProgressReminders.js";
 import { processMentorshipRole } from "./modules/processMentorshipRole.js";
 import { processUserGuildTag } from "./modules/processUserGuildTag.js";
@@ -60,12 +59,8 @@ const amari: Amari = {
     ],
     partials: [ Partials.Channel ],
   }),
-  github:       octokit,
-  githubApp:    githubApp,
-  lastRssItems: {
-    freeCodeCamp: null,
-    hackerNews:   null,
-  },
+  github:                 octokit,
+  githubApp:              githubApp,
   recentlyActiveChannels: new Set<string>(),
 };
 
@@ -78,10 +73,6 @@ amari.discord.once(Events.ClientReady, () => {
   );
   void cacheData(amari);
   analytics.startCron();
-  scheduleJob("post news", "0 * * * *", async() => {
-    await postFreeCodeCampNews(amari);
-    await postHackerNews(amari);
-  });
   scheduleJob("check guild tags", "0 0 * * *", async() => {
     await logger.log("debug", "Auditing guild tags.");
     await cacheData(amari);