Question

how to remove the layer of the metal that we have electroplated?

Answer 1

Perfect answer Hussain
But little addition :
The process is also called as de-plating and reverse electroplating. This process involve the reverse process called de-electroplating .

1) At anode inferior metal i.e the metal which you want to de-electroplate

2) At cathode superior metal the metal whose layer is on the metal