You need to decide. Most buyers will want a closet. So you can offer that it will be done before closing if you want, but it may deter some people. Buyers sometimes don't believe what they can not see.
Best of luck!
Regardless of whether or not a wardrobe is or is not a legitimate consideration for a closet shouldn't be your primary concern. Yes, you should be concerned about doing what is right but the bigger issue here may be whether or not buyers will be willing to accept this modification as an important feature of their future home.
The reality is that eventhough this change met your specific needs, it may not meet the needs of others. For resale purposes, it may be best to reinstall a closet.....