Undo previous changes on serial.h and serial.c. I'm sorry, that was my mistake.

stage2/serial.c

@@ -45,10 +45,6 @@ static struct divisor divisor_tab[] =
   { 115200, 0x0001 }
 };
 
-/* The position of the cursor.  */
-int serial_x;
-int serial_y;
-
 
 /* Read a byte from a port.  */
 static inline unsigned char

stage2/serial.h

@@ -65,13 +65,6 @@
 /* Turn on DTR, RTS, and OUT2.  */
 #define UART_ENABLE_MODEM	0x0B
 
-
-/* Variable prototypes.  */
-
-/* In the serial terminal, trace the cursor in GRUB itself.  */
-extern int serial_x;
-extern int serial_y;
-
 
 /* Function prototypes.  */