Similar to XMonad.Layout.Minimize but completely removes windows from the window set so XMonad.Layout.BoringWindows isn't necessary. Perfect companion to XMonad.Layout.BinarySpacePartition since it can be used to move windows to another part of the BSP tree.

You can use this module with the following in your xmonad.hs:

import XMonad.Layout.Hidden

Then edit your layoutHook by adding the HiddenWindows layout modifier:

myLayout = hiddenWindows (Tall 1 (3/100) (1/2)) ||| Full ||| etc..
main = xmonad def { layoutHook = myLayout }

For more detailed instructions on editing the layoutHook see the tutorial and XMonad.Doc.Extending.

In the key bindings, do something like:

       , ((modMask, xK_backslash), withFocused hideWindow)
       , ((modMask .|. shiftMask, xK_backslash), popOldestHiddenWindow)
       ...

For detailed instruction on editing the key bindings see:

the tutorial.