no need to modify source url in style-rewriter now we have cache busting

Author: yyx990803

lib/style-rewriter.js

@@ -81,11 +81,6 @@ module.exports = function (css, map) {
     .process(css, opts)
     .then(function (result) {
       var map = result.map && result.map.toJSON()
-      // ensure we give the style source a unique name
-      // so that Webpack doesn't get confused
-      if (map) {
-        map.sources[0] = query.file + '.style'
-      }
       cb(null, result.css, map)
     })
     .catch(function (e) {