feat: 移除 CLI 工程自定义条件编译平台校验

packages/uni-cli-shared/lib/package.js

 const uniI18n = require('@dcloudio/uni-cli-i18n')
 
-const PLATFORMS = [
-  'h5',
-  'app-plus',
-  'mp-weixin',
-  'mp-qq',
-  'mp-baidu',
-  'mp-alipay',
-  'mp-toutiao',
-  'mp-jd'
-]
-
 module.exports = {
   initCustomScript (name, pkgPath) {
     const pkg = require(pkgPath)
@@ -32,11 +21,6 @@ module.exports = {
       process.exit(0)
     }
 
-    if (PLATFORMS.indexOf(scriptOptions.env.UNI_PLATFORM) === -1) {
-      console.error(uniI18n.__('cliShared.supportPlatform', { 0: 'UNI_PLATFORM', 1: JSON.stringify(PLATFORMS) }))
-      process.exit(0)
-    }
-
     process.env.UNI_PLATFORM = scriptOptions.env.UNI_PLATFORM
 
     process.env.UNI_SCRIPT = name