Microblaze: Remove unused variable from paging init

Signed-off-by: Michal Simek <monstr@monstr.eu>

arch/microblaze/mm/init.c

@@ -41,7 +41,6 @@ unsigned int memory_size;
  */
 static void __init paging_init(void)
 {
-	int i;
 	unsigned long zones_size[MAX_NR_ZONES];
 
 	/* Clean every zones */