Removed OimoPhysics example. (mrdoob#25895)

Author: mrdoob

examples/files.json

@@ -391,7 +391,6 @@
 		"physics_ammo_rope",
 		"physics_ammo_terrain",
 		"physics_ammo_volume",
-		"physics_oimo_instancing",
 		"physics_rapier_instancing"
 	],
 	"misc": [