Do not treat "yoga-playground" as package (#1192)

Summary:
"yoga-playground" contains the code for the playground used on the Yoga website. It lives inside the "website" package, but also has its own separate package.json and lockfile.

The package wasn't ever published, and does not share a workspace with the website or other JS packages. We can remove the package.json and related files to remove the lockfile, build steps, etc, while letting it still be used by the website (the only thing using the playground right now).

Pull Request resolved: https://github.com/facebook/yoga/pull/1192

Test Plan: GitHub Actions will test that the website build still succeeds.

Reviewed By: christophpurrer

Differential Revision: D42240825

Pulled By: NickGerleman

fbshipit-source-id: fe0de2a25536d4e6b5a8531d0c0a2a51215fa38f

website/src/components/Playground/.npmignore

@@ -1,3 +0,0 @@
-src
-webpack.config.js
-node_modules

website/src/components/Playground/package.json

@@ -1,19 +0,0 @@
-{
-  "name": "yoga-playground",
-  "version": "1.0.0",
-  "main": "dist/index.js",
-  "author": "Daniel Büchele",
-  "license": "MIT",
-  "scripts": {
-    "build": "webpack && cp ../../../node_modules/antd/dist/antd.min.css dist/antd.min.css"
-  },
-  "devDependencies": {
-    "@babel/plugin-proposal-class-properties": "^7.5.5",
-    "@babel/plugin-transform-flow-strip-types": "^7.4.4",
-    "@babel/preset-react": "^7.0.0",
-    "babel-loader": "^8.0.6",
-    "css-loader": "^3.1.0",
-    "mini-css-extract-plugin": "^0.8.0",
-    "webpack": "^4.38.0"
-  }
-}

website/src/components/Playground/webpack.config.js

@@ -1,70 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-const path = require('path');
-const MiniCssExtractPlugin = require('mini-css-extract-plugin');
-
-module.exports = {
-  mode: 'production',
-  entry: './src/index.js',
-  output: {
-    path: path.resolve(__dirname, 'dist'),
-    filename: 'index.js',
-    libraryExport: 'default',
-    libraryTarget: 'commonjs2'
-  },
-  externals: {
-    // Don't bundle react or react-dom
-    react: {
-      commonjs: "react",
-      commonjs2: "react",
-      amd: "React",
-      root: "React"
-    },
-    "react-dom": {
-      commonjs: "react-dom",
-      commonjs2: "react-dom",
-      amd: "ReactDOM",
-      root: "ReactDOM"
-    }
-  },
-  plugins: [
-    new MiniCssExtractPlugin({
-      filename: 'index.css',
-    }),
-  ],
-  module: {
-    rules: [
-      {
-        test: /\.js$/,
-        exclude: /node_modules/,
-        use: {
-          loader: 'babel-loader',
-          options: {
-            "presets": ["@babel/preset-react"],
-            "plugins": ["@babel/plugin-transform-flow-strip-types", "@babel/plugin-proposal-class-properties"]
-          }
-        }
-      },
-      {
-        test: /\.css$/,
-        use: [
-          {
-            loader: MiniCssExtractPlugin.loader,
-            options: {
-              // you can specify a publicPath here
-              // by default it uses publicPath in webpackOptions.output
-              publicPath: '../',
-              hmr: process.env.NODE_ENV === 'development',
-            },
-          },
-          'css-loader',
-        ],
-      }
-    ]
-  }
-};