Removed some deprecated rules

Some of them are added directly in XO through eslint-plugin-node.

https://eslint.org/docs/user-guide/migrating-to-7.0.0#node-js-commonjs-rules-have-been-deprecated

Author: sindresorhus

Diff for: index.js

@@ -208,17 +208,7 @@ module.exports = {
 				caughtErrorsIgnorePattern: /^_$/.source
 			}
 		],
-		'handle-callback-err': 'warn',
 		'no-buffer-constructor': 'error',
-		'no-mixed-requires': [
-			'error',
-			{
-				grouping: true,
-				allowCall: true
-			}
-		],
-		'no-new-require': 'error',
-		'no-path-concat': 'error',
 		'no-restricted-imports': [
 			'error',
 			'domain',
@@ -227,14 +217,6 @@ module.exports = {
 			'sys',
 			'colors'
 		],
-		'no-restricted-modules': [
-			'error',
-			'domain',
-			'freelist',
-			'smalloc',
-			'sys',
-			'colors'
-		],
 		'array-bracket-newline': [
 			'error',
 			'consistent'