move hanging wooden sign back to signs_lib

(it's now handled by signs_lib's generic hanging-sign code)

models/basic_signs_hanging_sign.obj

@@ -1,62 +0,0 @@
-# Blender v2.79 (sub 0) OBJ File: 'basic_signs wooden hanging sign.blend'
-# www.blender.org
-o Cube
-v 0.437500 -0.312500 0.031250
-v 0.437500 -0.312500 -0.031250
-v 0.437500 0.312500 0.031250
-v 0.437500 0.312500 -0.031250
-v -0.437500 -0.312500 0.031250
-v -0.437500 -0.312500 -0.031250
-v -0.437500 0.312500 0.031250
-v -0.437500 0.312500 -0.031250
-v 0.437500 -0.312500 0.031250
-v 0.437500 -0.312500 -0.031250
-v 0.437500 0.312500 0.031250
-v 0.437500 0.312500 -0.031250
-v -0.437500 -0.312500 0.031250
-v -0.437500 -0.312500 -0.031250
-v -0.437500 0.312500 0.031250
-v -0.437500 0.312500 -0.031250
-v 0.500000 0.312500 0.000000
-v 0.500000 0.500000 0.000000
-v -0.500000 0.312500 0.000000
-v -0.500000 0.500000 0.000000
-vt 0.468750 0.812500
-vt 0.031250 0.812500
-vt 0.031250 0.187500
-vt 0.468750 0.187500
-vt 0.531250 0.812500
-vt 0.968750 0.812500
-vt 0.968750 0.187500
-vt 0.531250 0.187500
-vt 0.234375 0.000000
-vt 0.234375 1.000000
-vt 0.015625 1.000000
-vt 0.015625 -0.000000
-vt 0.609375 -0.000000
-vt 0.609375 1.000000
-vt 0.390625 1.000000
-vt 0.390625 -0.000000
-vt 0.765625 0.000000
-vt 0.765625 1.000000
-vt 1.000000 0.812500
-vt 1.000000 1.000000
-vt 0.000000 1.000000
-vt -0.000000 0.812500
-vn 0.0000 0.0000 -1.0000
-vn 0.0000 -0.0000 1.0000
-vn 0.0000 -1.0000 0.0000
-vn 0.0000 1.0000 0.0000
-vn 1.0000 0.0000 0.0000
-vn -1.0000 0.0000 0.0000
-g Cube_Cube_front-back
-s off
-f 8/1/1 4/2/1 2/3/1 6/4/1
-f 3/5/2 7/6/2 5/7/2 1/8/2
-g Cube_Cube_edges
-f 13/9/3 14/10/3 10/11/3 9/12/3
-f 11/13/4 12/14/4 16/15/4 15/16/4
-f 11/13/5 9/17/5 10/18/5 12/14/5
-f 13/9/6 15/16/6 16/15/6 14/10/6
-g Cube_Cube_hangers
-f 19/19/1 20/20/1 18/21/1 17/22/1

models/basic_signs_hanging_sign_entity.obj

@@ -1,15 +0,0 @@
-# Blender v2.79 (sub 0) OBJ File: 'basic_signs wooden hanging sign.blend'
-# www.blender.org
-o Plane
-v 0.406250 -0.281250 -0.042969
-v -0.406250 -0.281250 -0.042969
-v 0.406250 0.281250 -0.042969
-v -0.406250 0.281250 -0.042969
-vt 0.000000 0.000000
-vt 1.000000 0.000000
-vt 1.000000 1.000000
-vt 0.000000 1.000000
-vn 0.0000 -0.0000 -1.0000
-g Plane_Plane_None
-s off
-f 1/1/1 2/2/1 4/3/1 3/4/1