Remove unused default options

Author: simonsmith

lib/index.js

@@ -21,7 +21,7 @@ module.exports = preprocessor;
  */
 
 var defaults = {
-  minify: undefined,
+  minify: false,
   use: [
     'postcss-import',
     'postcss-custom-properties',
@@ -31,7 +31,6 @@ var defaults = {
     'postcss-reporter'
   ],
   'postcss-import': {
-    root: undefined,
     onImport: function(imported) {
       // Update the watch task with the list of imported files
       if (typeof global.watchCSS === 'function') {