Fix eslint issues

Author: tshemsedinov

JavaScript/1-functional/logger.js

@@ -7,7 +7,8 @@ const fs = require('fs');
 const logger = (file) => {
   const { isTTY } = file;
   const stream = isTTY ? file : fs.createWriteStream(file);
-  return (serializer = logger.defaultSerializer) => (app) => (module) => (kind) => {
+  const { defaultSerializer } = logger;
+  return (serializer = defaultSerializer) => (app) => (module) => (kind) => {
     const color = isTTY ? (logger.colors[kind] || logger.colors.info) : '';
     const normal = isTTY ? logger.colors.normal : '';
     return (msg) => {

JavaScript/3-sandbox/main.js

@@ -2,7 +2,6 @@
 
 const vm = require('vm');
 const fsp = require('fs').promises;
-const util = require('util');
 const metalog = require('metalog');
 
 (async () => {