Removing useless files.

Levels/Geometry/skybox.obj

@@ -1,40 +0,0 @@
-# Blender v2.72 (sub 0) OBJ File: 'skybox.blend'
-# www.blender.org
-o Cube
-v 1.000000 -1.000000 -1.000000
-v 1.000000 -1.000000 1.000000
-v -1.000000 -1.000000 1.000000
-v -1.000000 -1.000000 -1.000000
-v 1.000000 1.000000 -0.999999
-v 0.999999 1.000000 1.000001
-v -1.000000 1.000000 1.000000
-v -1.000000 1.000000 -1.000000
-vt 0.250001 0.000001
-vt 0.500000 0.000000
-vt 0.500001 0.333336
-vt 0.250001 0.333335
-vt 0.499999 0.999998
-vt 0.250001 0.999999
-vt 0.250002 0.666669
-vt 0.500000 0.666668
-vt 0.749998 0.333334
-vt 1.000000 0.333334
-vt 1.000001 0.666666
-vt 0.750005 0.666664
-vt 0.000001 0.333334
-vt -0.000000 0.666666
-vn -0.577300 0.577300 0.577300
-vn 0.577300 0.577300 0.577300
-vn 0.577300 0.577300 -0.577300
-vn -0.577300 0.577300 -0.577300
-vn -0.577300 -0.577300 0.577300
-vn -0.577300 -0.577300 -0.577300
-vn 0.577300 -0.577300 -0.577300
-vn 0.577300 -0.577300 0.577300
-s 1
-f 1/1/1 4/2/2 3/3/3 2/4/4
-f 5/5/5 6/6/6 7/7/7 8/8/8
-f 1/9/1 2/10/4 6/11/6 5/12/5
-f 2/13/4 3/4/3 7/7/7 6/14/6
-f 3/4/3 4/3/2 8/8/8 7/7/7
-f 5/12/5 8/8/8 4/3/2 1/9/1