docs: remove gray on brown example
docs: remove gray on brown example

inducer/urwid,hkoof/urwid,wardi/urwid,drestebon/urwid,tonycpsu/urwid,urwid/urwid,douglas-larocca/urwid,wardi/urwid,ivanov/urwid,wardi/urwid,douglas-larocca/urwid,inducer/urwid,tonycpsu/urwid,rndusr/urwid,drestebon/urwid,harlowja/urwid,ivanov/urwid,douglas-larocca/urwid,hkoof/urwid,inducer/urwid,foreni-packages/urwid,foreni-packages/urwid,urwid/urwid,drestebon/urwid,rndusr/urwid,urwid/urwid,rndusr/urwid,foreni-packages/urwid,hkoof/urwid,harlowja/urwid,tonycpsu/urwid,ivanov/urwid,harlowja/urwid