removed the calls for this somewhere else, i'll update it to the new system later

Signed-off-by: Miles Whiticker <miles.whiticker@gmail.com>
added/redid the shell of mounting structures on girders, i'll come back to this later (structures can only be mounted on girders, i guess that makes things simpler)

Signed-off-by: Miles Whiticker <miles.whiticker@gmail.com>
cleaned up overlay plating buildpoints on girders, they should now properly create/be cleaned up

Signed-off-by: Miles Whiticker <miles.whiticker@gmail.com>