build: simplify compiler package setup

packages/compiler-dom/.npmignore

@@ -1,3 +0,0 @@
-__tests__/
-__mocks__/
-dist/packages

packages/compiler-dom/README.md

@@ -1 +0,0 @@
-# @vue/compiler-dom

packages/compiler-dom/index.js

@@ -1,7 +0,0 @@
-'use strict'
-
-if (process.env.NODE_ENV === 'production') {
-  module.exports = require('./dist/compiler-dom.cjs.prod.js')
-} else {
-  module.exports = require('./dist/compiler-dom.cjs.js')
-}

packages/compiler-dom/package.json

@@ -1,21 +0,0 @@
-{
-  "name": "@vue/compiler-dom",
-  "version": "3.0.0-alpha.1",
-  "description": "@vue/compiler-dom",
-  "main": "index.js",
-  "module": "dist/compiler-dom.esm-bundler.js",
-  "typings": "dist/index.d.ts",
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/vuejs/vue.git"
-  },
-  "keywords": [
-    "vue"
-  ],
-  "author": "Evan You",
-  "license": "MIT",
-  "bugs": {
-    "url": "https://github.com/vuejs/vue/issues"
-  },
-  "homepage": "https://github.com/vuejs/vue/tree/dev/packages/compiler-dom#readme"
-}