cleanup old ginger models

src/main/resources/models/grass.obj

@@ -1,26 +0,0 @@
-# Blender v2.79 (sub 0) OBJ File: 'very good grass.blend'
-# www.blender.org
-o Plane
-v 0.000000 1.963634 1.000000
-v -0.000000 -0.036366 1.000000
-v 0.000000 1.963634 -1.000000
-v -0.000000 -0.036366 -1.000000
-v -0.978509 1.963634 0.206204
-v -0.978509 -0.036366 0.206204
-v 0.978509 1.963634 -0.206204
-v 0.978509 -0.036366 -0.206204
-vt 0.000977 -0.001953
-vt 1.000000 1.000000
-vt 0.000000 1.000000
-vt 0.997070 0.001953
-vt -0.001953 0.998047
-vt 0.998047 0.000000
-vt 0.998047 0.997070
-vt 0.003907 -0.002930
-vn 1.0000 -0.0000 0.0000
-vn 0.2062 -0.0000 0.9785
-s off
-f 2/1/1 3/2/1 1/3/1
-f 2/1/1 4/4/1 3/2/1
-f 5/5/2 8/6/2 7/7/2
-f 5/5/2 6/8/2 8/6/2