Once metals are dissolved in aqua regia, the only way to drop all metals would be to convert it into NaCl (salt water), leaving solution with sodium metal ions, to remove sodium, one would use electrolysis to plate out the sodium metal from solution, Caution the metal would be explosive in the damp air.
A foolish question? No.
It would be foolish to use aqua regia on any metal without understanding the answer to your question.
Only a fool would start mixing chemicals and metal without any understanding of the dangers and how to work with them safely.
In my personal opinion, no one should attempt to make aqua regia, or use any acids to dissolve any metal before understanding how to remove metals from solution and make the products safe. to use aqua regia, or to dissolve metals without this understanding is not only foolish but also very dangerous to yourself and others.
If you do not understand how to remove metals from the solution you have no business of dissolving them into solution.
See our safety section, read dealing with waste, understand the reactivity series of metals.
Understand how to use aqua regia or any metal solutions safely.
A study dealing with waste, these will not only help you work safely but will give you a greater understanding of metal chemistry, this understanding with further research is very important to understanding the overall chemistry of precious metal recovery and refining.
A study of the basics like dealing with waste is one of the most important tools you can have in your toolbox, this basic understanding is one of the main principles to the understanding of the chemistry we use to recover and refine precious metals.