cris/kgdb: Remove unused static int do_printk

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/cris/arch-v10/kernel/kgdb.c

@@ -676,8 +676,6 @@ hex (char ch)
    Put the result in buf, and return a pointer to the last character
    in buf (null). */
 
-static int do_printk = 0;
-
 static char *
 mem2hex(char *buf, unsigned char *mem, int count)
 {