chore: fix lint errors; tweak lint rules

backend/src/plugins/Utility/commands/AboutCmd.ts

@@ -25,7 +25,7 @@ export const AboutCmd = utilityCmd({
     try {
       const lcl = new LCL(rootDir);
       lastCommit = await lcl.getLastCommit();
-    } catch {} // tslint:disable-line:no-empty
+    } catch {} // eslint-disable-line no-empty
 
     let lastUpdate;
     let version;

backend/src/plugins/Utility/commands/JumboCmd.ts

@@ -31,8 +31,6 @@ function resizeBuffer(input: Buffer, width: number, height: number): Buffer {
   return photonImageToBuffer(photonImage);
 }
 
-const CDN_URL = "https://twemoji.maxcdn.com/";
-
 export const JumboCmd = utilityCmd({
   trigger: "jumbo",
   description: "Makes an emoji jumbo",
@@ -75,7 +73,7 @@ export const JumboCmd = utilityCmd({
       let image: Buffer | undefined;
       try {
         const downloadedBuffer = await getBufferFromUrl(url);
-        image = resizeBuffer(await getBufferFromUrl(url), size, size);
+        image = resizeBuffer(downloadedBuffer, size, size);
       } catch (err) {
         if (url.toLocaleLowerCase().endsWith("fe0f.png")) {
           url = url.slice(0, url.lastIndexOf("-fe0f")) + ".png";

backend/src/plugins/Utility/commands/PingCmd.ts

@@ -1,9 +1,8 @@
 import { Message } from "discord.js";
+import { performance } from "perf_hooks";
 import { noop, trimLines } from "../../../utils";
 import { utilityCmd } from "../types";
 
-const { performance } = require("perf_hooks");
-
 export const PingCmd = utilityCmd({
   trigger: ["ping", "pong"],
   description: "Test the bot's ping to the Discord API",

backend/src/plugins/Utility/commands/ReloadGuildCmd.ts

@@ -7,7 +7,7 @@ export const ReloadGuildCmd = utilityCmd({
   description: "Reload the Zeppelin configuration and all plugins for the server. This can sometimes fix issues.",
   permission: "can_reload_guild",
 
-  async run({ message: msg, args, pluginData }) {
+  async run({ message: msg, pluginData }) {
     if (activeReloads.has(pluginData.guild.id)) return;
     activeReloads.set(pluginData.guild.id, msg.channel as TextChannel);