How to Un-install Photoshop Panels
You can simply close any panel by right-clicking its name at the top of the panel. There is actually no need to uninstall.
But if you wish to uninstall, use any one of these following methods:
OSX (Open Go/Go To Folder in Finder and you can paste in these destinations):
Windows: (note that these are hidden folders on Windows, so best to copy and paste the destination into the top of the file browser)