Remove unused models

models/grenade_regular.mtl

@@ -1,10 +0,0 @@
-# Blender MTL File: 'None'
-# Material Count: 1
-
-newmtl None
-Ns 0
-Ka 0.000000 0.000000 0.000000
-Kd 0.8 0.8 0.8
-Ks 0.8 0.8 0.8
-d 1
-illum 2

models/grenade_regular.obj

@@ -1,40 +0,0 @@
-# Blender v2.79 (sub 0) OBJ File: ''
-# www.blender.org
-mtllib grenade_regular.mtl
-o Cube_Cube.001
-v -0.202887 -0.445911 -0.202887
-v -0.202887 0.179806 -0.202887
-v 0.202887 -0.445911 -0.202887
-v 0.202887 0.179806 -0.202887
-v -0.202887 -0.445911 0.202887
-v -0.202887 0.179806 0.202887
-v 0.202887 -0.445911 0.202887
-v 0.202887 0.179806 0.202887
-v -0.033569 0.125949 -0.310149
-v -0.033569 0.314819 -0.310149
-v 0.053858 0.125949 -0.310149
-v 0.053858 0.314819 -0.310149
-v -0.033569 0.125949 -0.121278
-v -0.033569 0.314819 -0.121278
-v 0.053858 0.125949 -0.121278
-v 0.053858 0.314819 -0.121278
-vn 0.0000 0.0000 -1.0000
-vn 1.0000 0.0000 0.0000
-vn 0.0000 0.0000 1.0000
-vn -1.0000 0.0000 0.0000
-vn 0.0000 -1.0000 0.0000
-vn 0.0000 1.0000 0.0000
-usemtl None
-s off
-f 1//1 2//1 4//1 3//1
-f 3//2 4//2 8//2 7//2
-f 7//3 8//3 6//3 5//3
-f 5//4 6//4 2//4 1//4
-f 3//5 7//5 5//5 1//5
-f 8//6 4//6 2//6 6//6
-f 9//1 10//1 12//1 11//1
-f 11//2 12//2 16//2 15//2
-f 15//3 16//3 14//3 13//3
-f 13//4 14//4 10//4 9//4
-f 11//5 15//5 13//5 9//5
-f 16//6 12//6 10//6 14//6