powerpc: Remove xmon.h include from arch/powerpc/platforms/powermac/pic.c

... since it isn't needed.
Signed-off-by: NPaul Mackerras <paulus@samba.org>

arch/powerpc/platforms/powermac/pic.c

@@ -33,7 +33,6 @@
 #include <asm/prom.h>
 #include <asm/pci-bridge.h>
 #include <asm/time.h>
-#include <asm/xmon.h>
 #include <asm/pmac_feature.h>
 #include <asm/mpic.h>