drivers/net/wan/x25_asy: Remove an unused flag "SLF_OUTWAIT"

The "SLF_OUTWAIT" flag defined in x25_asy.h is not actually used.
It is only cleared at one place in x25_asy.c but is never read or set.
So we can remove it.
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/wan/x25_asy.c

@@ -243,8 +243,6 @@ static void x25_asy_encaps(struct x25_asy *sl, unsigned char *icp, int len)
 	actual = sl->tty->ops->write(sl->tty, sl->xbuff, count);
 	sl->xleft = count - actual;
 	sl->xhead = sl->xbuff + actual;
-	/* VSV */
-	clear_bit(SLF_OUTWAIT, &sl->flags);	/* reset outfill flag */
 }
 
 /*

drivers/net/wan/x25_asy.h

@@ -35,7 +35,6 @@ struct x25_asy {
 #define SLF_INUSE	0		/* Channel in use               */
 #define SLF_ESCAPE	1               /* ESC received                 */
 #define SLF_ERROR	2               /* Parity, etc. error           */
-#define SLF_OUTWAIT	4		/* Waiting for output		*/
 };