refactor: remove unused code

Author: patrickhulce

lib/parser/postcss.js

@@ -8,14 +8,6 @@ class PostCssParser {
       postcss.parse(contentOrParsed) : contentOrParsed
   }
 
-  get content() {
-    return this._parsed.toString()
-  }
-
-  get parsed() {
-    return this._parsed
-  }
-
   traverse(handleComment, handleRuleset) {
     this._parsed.walk(node => {
       if (node.type === 'comment') {