h8300: remove unused variable

Kernel test robot throws below warning ->

>> arch/h8300/kernel/setup.c:72:26:
warning: Unused variable: region [unusedVariable]
    struct memblock_region *region;

Fixed it by removing unused variable.

Link: https://lkml.kernel.org/r/20210602185431.11416-1-jrdr.linux@gmail.comSigned-off-by: NSouptick Joarder <jrdr.linux@gmail.com>
Reported-by: Nkernel test robot <lkp@intel.com>
Acked-by: NMike Rapoport <rppt@linux.ibm.com>
Acked-by: NYoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/h8300/kernel/setup.c

@@ -69,8 +69,6 @@ void __init h8300_fdt_init(void *fdt, char *bootargs)
 
 static void __init bootmem_init(void)
 {
-	struct memblock_region *region;
-
 	memory_end = memory_start = 0;
 
 	/* Find main memory where is the kernel */