Remove a bit of unused code.
Toggling float for untracked windows will start to track them if possible.

This is intended as a fix for #94 that does not involve restarting Amethyst.
Merge pull request #96 from ianyh/tile-windows

Make floating toggle tile untiled windows where possible
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into borderless-iterm