powerpc/prom_init: Remove linux,stdout-package property

This property was added in 2004 and the only use of it, which was
already inside `#if 0`, was removed a month later.

Signed-off-by: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/prom_init.c

@@ -2102,8 +2102,6 @@ static void __init prom_init_stdout(void)
 	stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
 	if (stdout_node != PROM_ERROR) {
 		val = cpu_to_be32(stdout_node);
-		prom_setprop(prom.chosen, "/chosen", "linux,stdout-package",
-			     &val, sizeof(val));
 
 		/* If it's a display, note it */
 		memset(type, 0, sizeof(type));