Remove commented out defines.

Firmware/printers.h

@@ -3,17 +3,6 @@
 
 #define PRINTER_UNKNOWN 0
 
-/* original definition(s)
-#define PRINTER_MK1         100
-#define PRINTER_MK2         200
-#define PRINTER_MK2_SNMM    201
-#define PRINTER_MK25        250
-#define PRINTER_MK25_SNMM   251
-#define PRINTER_MK25S	   252
-#define PRINTER_MK3         300
-#define PRINTER_MK3_SNMM    301
-#define PRINTER_MK3S	   302
-*/
 // *** MK1
 #define PRINTER_MK1	               100
 #define PRINTER_MK1_NAME           "MK1"