fix(lint): Address several linting errors

My bad, forgot to run lint first before pushing branch

lib/config.js

@@ -82,14 +82,12 @@
 
 'use strict';
 
-const fs = require('node:fs');
 const path = require('node:path');
 const util = require('node:util');
 const ytmp3 = require('./ytmp3');
 const {
   isNullOrUndefined,
   isObject,
-  logger: log
 } = require('./utils');
 const {
   resolveOptions: resolveACOptions
@@ -161,12 +159,10 @@ function resolveConfig({ config, file }) {
   // By using this below logic, if user specified with any falsy value
   // or unspecified it will uses the fallback value instead
   let downloadOptions = config.downloadOptions || {};
-  let audioConverterOptions, acOptionsFrom;
+  let audioConverterOptions;
   if ('converterOptions' in downloadOptions) {
-    acOptionsFrom = 'downloadOptions.converterOptions';
     audioConverterOptions = downloadOptions.converterOptions || {};
   } else if ('audioConverterOptions' in config) {
-    acOptionsFrom = 'audioConverterOptions';
     audioConverterOptions = config.audioConverterOptions || {};
   }