remove commented code in cube.py
remove commented code in cube.py

QuLogic/vispy,michaelaye/vispy,srinathv/vispy,srinathv/vispy,drufat/vispy,sbtlaarzc/vispy,ghisvail/vispy,RebeccaWPerry/vispy,kkuunnddaannkk/vispy,RebeccaWPerry/vispy,michaelaye/vispy,jay3sh/vispy,dchilds7/Deysha-Star-Formation,Eric89GXL/vispy,QuLogic/vispy,michaelaye/vispy,drufat/vispy,Eric89GXL/vispy,bollu/vispy,dchilds7/Deysha-Star-Formation,kkuunnddaannkk/vispy,inclement/vispy,kkuunnddaannkk/vispy,sh4wn/vispy,jdreaver/vispy,srinathv/vispy,sbtlaarzc/vispy,RebeccaWPerry/vispy,julienr/vispy,julienr/vispy,bollu/vispy,jay3sh/vispy,QuLogic/vispy,Eric89GXL/vispy,dchilds7/Deysha-Star-Formation,drufat/vispy,jay3sh/vispy,julienr/vispy,inclement/vispy,inclement/vispy,sbtlaarzc/vispy,sh4wn/vispy,jdreaver/vispy,sh4wn/vispy,bollu/vispy,ghisvail/vispy,ghisvail/vispy,jdreaver/vispy