hw/ppc: Remove unused defines

Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

hw/ppc/ppc4xx_devs.c

@@ -27,8 +27,6 @@
 #include "qemu/log.h"
 #include "exec/address-spaces.h"
 
-//#define DEBUG_MMIO
-//#define DEBUG_UNASSIGNED
 #define DEBUG_UIC