pc kernel: remove i8253link

sys/src/9/pc/fns.h

@@ -52,7 +52,6 @@ void	i8250mouse(char*, int (*)(Queue*, int), int);
 void	i8250setmouseputc(char*, int (*)(Queue*, int));
 void	i8253enable(void);
 void	i8253init(void);
-void	i8253link(void);
 uvlong	i8253read(uvlong*);
 void	i8253timerset(uvlong);
 int	i8259disable(int);

sys/src/9/pc/i8253.c

@@ -236,11 +236,6 @@ i8253enable(void)
 	intrenable(IrqCLOCK, i8253clock, 0, BUSUNKNOWN, "clock");
 }
 
-void
-i8253link(void)
-{
-}
-
 /*
  *  return the total ticks of counter 2.  We shift by
  *  8 to give timesync more wriggle room for interpretation

sys/src/9/pc/main.c

@@ -119,7 +119,6 @@ main(void)
 	conf.monitor = 1;
 	chandevreset();
 	pageinit();
-	i8253link();
 	swapinit();
 	userinit();
 	active.thunderbirdsarego = 1;