removed import numpy, the cause of #2314
removed import numpy, the cause of #2314

walterbender/turtleart,max630/turtleart-hacks,walterbender/AmazonasTortuga,AlanJAS/turtleart,max630/turtleart-hacks,walterbender/turtleconfusion,walterbender/turtleflags,walterbender/turtle3D,walterbender/turtleartmini