[cli] Remove preinstall script (#10157)

This will solve two of the warnings from [Socket.dev](https://socket.dev/npm/package/vercel):

<img width="1126" alt="image" src="https://github.com/vercel/vercel/assets/229881/c890c973-4f5a-44d9-9b96-2580a1e40ed0">

This preinstall script isn't necessary to run Vercel CLI, its only used to improve the error message in two cases:

- The system has `node` version prior to 14.x (3 years ago)
- The system still has `now` installed but should be using `vercel` (last shipped 3 years ago)

The usage of `preinstall` scripts have gone out of style due to security audits so we should remove this script now.

.changeset/wet-spoons-boil.md

@@ -0,0 +1,5 @@
+---
+"vercel": patch
+---
+
+[cli] Remove `preinstall` script

packages/cli/package.json

@@ -11,7 +11,6 @@
     "directory": "packages/cli"
   },
   "scripts": {
-    "preinstall": "node ./scripts/preinstall.js",
     "test": "jest --env node --verbose --bail",
     "test-unit": "pnpm test test/unit/",
     "test-e2e": "rimraf test/fixtures/integration && pnpm test test/integration-1.test.ts test/integration-2.test.ts test/integration-3.test.ts",

packages/cli/scripts/preinstall.js

@@ -1,101 +0,0 @@
-#!/usr/bin/env node
-const { join } = require('path');
-const { statSync } = require('fs');
-const pkg = require('../package');
-
-function error(command) {
-  console.error('> Error:', command);
-}
-
-function debug(str) {
-  if (
-    process.argv.find(str => str === '--debug') ||
-    process.env.PREINSTALL_DEBUG
-  ) {
-    console.log(`[debug] [${new Date().toISOString()}]`, str);
-  }
-}
-
-function isYarn() {
-  return process.env.npm_config_heading !== 'npm';
-}
-
-function isGlobal() {
-  const cmd = JSON.parse(process.env.npm_config_argv || '{ "original": [] }');
-
-  return isYarn()
-    ? cmd.original.includes('global')
-    : Boolean(process.env.npm_config_global);
-}
-
-function isVercel() {
-  return pkg.name === 'vercel';
-}
-
-function validateNodeVersion() {
-  let semver = '>= 0';
-  let major = '1';
-
-  try {
-    major = process.versions.node.split('.')[0];
-    const pkg = require('../package.json');
-    semver = pkg.engines.node;
-  } catch (e) {
-    debug('Failed to read package.json engines');
-  }
-
-  const isValid = eval(`${major} ${semver}`);
-  return { isValid, expected: semver, actual: process.versions.node };
-}
-
-function isInNodeModules(name) {
-  try {
-    const nodeModules = join(__dirname, '..', '..');
-    const stat = statSync(join(nodeModules, name));
-    return stat.isDirectory();
-  } catch (err) {
-    return false;
-  }
-}
-
-async function main() {
-  if (!isGlobal()) {
-    debug('Skipping preinstall since Vercel CLI is being installed locally');
-    return;
-  }
-
-  const ver = validateNodeVersion();
-
-  if (!ver.isValid) {
-    error(
-      `Detected unsupported Node.js version.\n` +
-        `Expected "${ver.expected}" but found "${ver.actual}".\n` +
-        `Please update to the latest Node.js LTS version to install Vercel CLI.`
-    );
-    process.exit(1);
-  }
-
-  if (isVercel() && isInNodeModules('now')) {
-    const uninstall = isYarn()
-      ? 'yarn global remove now'
-      : 'npm uninstall -g now';
-    console.error(`NOTE: Run \`${uninstall}\` to uninstall \`now\`\n`);
-  }
-}
-
-process.on('unhandledRejection', err => {
-  console.error('Unhandled Rejection:');
-  console.error(err);
-  process.exit(1);
-});
-
-process.on('uncaughtException', err => {
-  console.error('Uncaught Exception:');
-  console.error(err);
-  process.exit(1);
-});
-
-main().catch(err => {
-  console.error(err);
-  process.exit(1);
-});