tty: Remove unused SERIAL_DO_RESTART define

SERIAL_DO_RESTART is not used by these 3 drivers; remove.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/amiserial.c

@@ -32,7 +32,6 @@
 #include <linux/delay.h>
 
 #undef SERIAL_PARANOIA_CHECK
-#define SERIAL_DO_RESTART
 
 /* Set of debugging defines */
 

drivers/tty/moxa.c

@@ -155,7 +155,6 @@ struct mon_str {
 #define LOWWAIT 	2
 #define EMPTYWAIT	3
 
-#define SERIAL_DO_RESTART
 
 #define WAKEUP_CHARS		256
 

drivers/tty/serial/icom.c

@@ -22,7 +22,6 @@
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
   *
   */
-#define SERIAL_DO_RESTART
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>