xtensa: ISS: drop unused io.c

# "prom monitor" library routines under Linux.

#

obj-y			= io.o console.o setup.o

obj-y			= console.o setup.o

obj-$(CONFIG_NET)	+= network.o

/* This file isn't really needed right now. */

#if 0

#include <asm/io.h>

#include <platform/platform-iss/simcall.h>

extern int __simc ();

char iss_serial_getc()

{

  char c;

  __simc( SYS_read, 0, &c, 1 );

  return c;

}

void iss_serial_putc( char c )

{

  __simc( SYS_write, 1, &c, 1 );

}

void iss_serial_puts( char *s )

{

  if( s != 0 && *s != 0 )

    __simc( SYS_write, 1, s, strlen(s) );

}

/*#error Need I/O ports to specific hardware!*/

#endif