The plate would be very hard to remove as a field mod.  It, as Sax said, exists to protect the canopy flex during opening and closing.  It also provides a minor amount of protection, but would likely just come apart as the canopy offers very little and would simply break.
As for a field mod removal, think of it this way.  What would you replace it with when you took it out, as full canopy's did not exist at that time.