xtensa: ISS: drop unused io.c

Signed-off-by: NMax Filippov <jcmvbkbc@gmail.com>
Signed-off-by: NChris Zankel <chris@zankel.net>

arch/xtensa/platforms/iss/Makefile

@@ -4,5 +4,5 @@
 # "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

arch/xtensa/platforms/iss/io.c

-/* 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
-