Blender export to unity without the armature object, how to?

when exporting rigged character from blender to unity, there is always an object “armature” parent to Root bone.
I read it on the forum that someone hacked the FBX export for unreal to kill the “armature” object. if I use the unreal exporter for unity, the scale and rotation are all messed up.
is there any method for export to Unity which kill the armature part?