using Prettier's hasNewline and ignoring our old implementation for this

Author: Janther

src/comments/printer.js

@@ -1,9 +1,9 @@
 const {
   doc: {
     builders: { hardline, join }
-  }
+  },
+  util: { hasNewline }
 } = require('prettier');
-const { hasNewline } = require('../prettier-comments/common/util');
 
 function isIndentableBlockComment(comment) {
   // If the comment has multiple lines and every line starts with a star