title: How to disable optimize warnings in webpack 2
body: <p>I am working with React/Webpack 2 etc. I have Karma test runner and when I run my tests I launch Webpack before, and it throws to the console warning output about size etc. (I can't fix it because it is webpack stuff).</p>
  
  <p>How do I can disable these warnings? I tried to set</p>
  
  <p><em>stats : "none"</em>  but it isn't working.  </p>
  
  <p>Thanks for any help</p>
  
  <pre><code>WARNING in ./src/modules/Module1/index.js
  There are multiple modules with names that only differ in casing.
  This can lead to unexpected behavior when compiling on a filesystem with other case-semantic.
  Use equal casing. Compare these module identifiers:
  * C:\work\EazeGamesClient\node_modules\babel-loader\lib\index.js!C:\work\EazeGamesClient\node_modules\eslint-loader\index.js?{"fix":true}!C:\work\EazeGamesClient\src\modules\Module1\index.js
  * C:\work\EazeGamesClient\node_modules\babel-loader\lib\index.js!C:\work\EazeGamesClient\node_modules\eslint-loader\index.js?{"fix":true}!C:\work\EazeGamesClient\src\modules\module1\index.js
      Used by 1 module(s), i. e.
      C:\work\EazeGamesClient\node_modules\babel-loader\lib\index.js!C:\work\EazeGamesClient\node_modules\eslint-loader\index.js?{"fix":true}!C:\work\EazeGamesClient\src\routes.js
  
  WARNING in ./src/modules/Module1/containers/Module1.container.js
  There are multiple modules with names that only differ in casing.
  This can lead to unexpected behavior when compiling on a filesystem with other case-semantic.
  Use equal casing. Compare these module identifiers:
  * C:\work\EazeGamesClient\node_modules\babel-loader\lib\index.js!C:\work\EazeGamesClient\node_modules\eslint-loader\index.js?{"fix":true}!C:\work\EazeGamesClient\src\modules\Module1\containers\Module1.container.js
      Used by 1 module(s), i. e.
      C:\work\EazeGamesClient\node_modules\babel-loader\lib\index.js!C:\work\EazeGamesClient\node_modules\eslint-loader\index.js?{"fix":true}!C:\work\EazeGamesClient\src\modules\Module1\index.js
  * C:\work\EazeGamesClient\node_modules\babel-loader\lib\index.js!C:\work\EazeGamesClient\node_modules\eslint-loader\index.js?{"fix":true}!C:\work\EazeGamesClient\src\modules\module1\containers\Module1.container.js
      Used by 1 module(s), i. e.
      C:\work\EazeGamesClient\node_modules\babel-loader\lib\index.js!C:\work\EazeGamesClient\node_modules\eslint-loader\index.js?{"fix":true}!C:\work\EazeGamesClient\src\modules\module1\index.js
  
  WARNING in asset size limit: The following asset(s) exceed the recommended size limit (250 kB).
  This can impact web performance.
  Assets:
    src/containers/Root.container.js (825 kB)
    src/containers/Root.container.dev.js (821 kB)
    src/store/configureStore.js (629 kB)
    src/store/configureStore.dev.js (628 kB)
    src/containers/DevTools.js (612 kB)
    src/containers/Root.container.prod.js (389 kB)
  
  WARNING in entrypoint size limit: The following entrypoint(s) combined asset size exceeds the recommended limit (250 kB). This can impact web performance.
  Entrypoints:
    src/containers/DevTools.js (612 kB)
        src/containers/DevTools.js
  
    src/containers/Root.container.dev.js (821 kB)
        src/containers/Root.container.dev.js
  
    src/containers/Root.container.js (825 kB)
        src/containers/Root.container.js
  
    src/containers/Root.container.prod.js (389 kB)
        src/containers/Root.container.prod.js
  
    src/store/configureStore.dev.js (628 kB)
        src/store/configureStore.dev.js
  
    src/store/configureStore.js (629 kB)
        src/store/configureStore.js
  
  
  WARNING in webpack performance recommendations:
  You can limit the size of your bundles by using System.import() or require.ensure to lazy load some parts of your application.
  For more info visit https://webpack.js.org/guides/code-splitting/
  </code></pre>
  
  <p>P.S.   Update 1</p>
  
  <p>webpack.testing.config</p>
  
  <pre><code>let process = require("process"),
      autoprefixer = require('autoprefixer'),
      precss = require('precss'),
  
      webpack = require("webpack"),
      helpers = require("./helpers"),
  
      ExtractTextPlugin = require("extract-text-webpack-plugin"),
      CssSourcemapPlugin = require("css-sourcemaps-webpack-plugin"),
  
      srcName = "src";
  
  module.exports = {
      entry : {
          "vendor" : ["react", "react-dom", "react-router", "redux", "react-router-redux"],
          "app" : helpers.root(srcName, "index.js")
      },
      output : {
          path : helpers.root("dist"),
          publicPath : "/",
          filename : "[name].[hash].bundle.js",
          chunkFilename : "[id].[hash].bundle.chunk.js"
      },
      context : helpers.root(srcName),
  
      module : {
          rules : [
              {
                  enforce : 'pre',
                  test : /\.jsx?$/,
                  loader : 'eslint-loader',
                  options: {
                      fix: true,
                  },
                  include: helpers.root(srcName)
              },
              {
                  test : /\.jsx?$/,
                  loaders : [
                      'babel-loader',
                  ],
                  exclude : /node_modules/
              },
              {
                  test : /\.css$/,
                  loaders : [
                      'style-loader',
                      'css-loader?modules',
                      'postcss-loader',
                  ],
              },
          ],
      },
  
      stats: "none",
  
      devtool: 'inline-source-map',
  
  
      plugins : [
          new webpack.LoaderOptionsPlugin({
              options : {
                  eslint : {
                      configFile : '.eslintrc',
                      failOnWarning : false,
                      failOnError : false
                  }
              }
          }),
          new CssSourcemapPlugin(),
          new ExtractTextPlugin("[name].[hash].css")
      ],
  
      performance: {
          hints: false
      }
  };
  </code></pre>