Remove update-notifier

Not enough benefit to be worth it.

Fixes #559

Author: sindresorhus

cli-main.js

@@ -1,6 +1,5 @@
 #!/usr/bin/env node
 'use strict';
-const updateNotifier = require('update-notifier');
 const getStdin = require('get-stdin');
 const meow = require('meow');
 const formatterPretty = require('eslint-formatter-pretty');
@@ -113,8 +112,6 @@ const cli = meow(`
 	}
 });
 
-updateNotifier({pkg: cli.pkg}).notify();
-
 const {input, flags: options, showVersion} = cli;
 
 // TODO: Fix this properly instead of the below workaround.

package.json

@@ -95,8 +95,7 @@
 		"semver": "^7.3.5",
 		"slash": "^3.0.0",
 		"to-absolute-glob": "^2.0.2",
-		"typescript": "^4.2.4",
-		"update-notifier": "^5.1.0"
+		"typescript": "^4.2.4"
 	},
 	"devDependencies": {
 		"ava": "^3.15.0",