powerpc/xmon: Remove empty xmon_map_scc()

This has been empty since 2005, commit 51d3082f "Unify udbg (#2)".
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/xmon/nonstdio.h

@@ -8,6 +8,5 @@ extern int xmon_getchar(void);
 extern void xmon_puts(const char *);
 extern char *xmon_gets(char *, int);
 extern void xmon_printf(const char *, ...);
-extern void xmon_map_scc(void);
 extern int xmon_write(const void *ptr, int nb);
 extern int xmon_readchar(void);

arch/powerpc/xmon/start.c

@@ -10,10 +10,6 @@
 #include <asm/udbg.h>
 #include "nonstdio.h"
 
-void xmon_map_scc(void)
-{
-}
-
 int xmon_write(const void *ptr, int nb)
 {
 	return udbg_write(ptr, nb);

arch/powerpc/xmon/xmon.c

@@ -2943,7 +2943,6 @@ static void xmon_init(int enable)
 		__debugger_dabr_match = NULL;
 		__debugger_fault_handler = NULL;
 	}
-	xmon_map_scc();
 }
 
 #ifdef CONFIG_MAGIC_SYSRQ