title: Exclude style/css-loader from webpack when using ExtractTextPlugin
body: <p>I'm using <code>ExtractTextPlugin</code> with <code>webpack</code> so that our site's CSS is extracted into a typical <code>.css</code> file.</p>
  
  <p>According to the bundle stats though, <code>style-loader</code> and <code>css-loader</code> are apparently included in the final bundle (roughly 7k uncompressed.) It's not a lot of file size but I'd rather not have those libs included if possible. I don't think they're doing anything now that the css is separate.</p>
  
  <p>Is there any way for me to exclude those libs? </p>