Can 'Colors Not Used' be deleted in Quark?

Using AppleScript, is there a way to delete the ‘Colors Not Used’ in Quark?

This is found under Edit>Colors, Show: Colors Not Used

Thanks in advance for any help that you can provide!

Posted: Thu Sep 23, 2004
Tony Perkins
Ridgeland, Mississippi

tell application “QuarkXPress™ 4.11”
do script {deleteunusedcolors}
end tell

script deleteunusedcolors
tell application “QuarkXPress™ 4.11”
activate
if document 1 exists then

		set ColorsToKeep to {"Magenta", "Yellow", "Black", "Cyan", "Registration", "White"} as list
		try
			set ColorsToKeep to ColorsToKeep & (name of color of every generic box of document 1)
		end try
		try
			set ColorsToKeep to ColorsToKeep & (name of color of every image of every generic box of document 1)
		end try
		try
			set ColorsToKeep to ColorsToKeep & (name of color of every word of every story of document 1)
		end try
		
		set ColorCount to count of color specs of document 1
		set ColorsToDelete to {}
		tell document 1
			repeat with x from 1 to ColorCount
				if color spec x exists then
					set ThisColor to name of color spec x
					if ThisColor is not in ColorsToKeep then
						copy x to the end of ColorsToDelete
					end if
				end if
			end repeat
			set ColorsToDelete to the reverse of ColorsToDelete
			repeat with x in ColorsToDelete
				delete color spec x
			end repeat
		end tell
	end if
	do updates
end tell

end script