PM: hibernate: Drop unnecessary local variable initialization

It is not necessary to intialize the error variable in
create_basic_memory_bitmaps(), because it is only read after
being assigned a value.

Signed-off-by: Wang chaodong <[e-mail]>
[ rjw: Subject and changelog rewrite ]
Signed-off-by: Rafael J. Wysocki <[e-mail]>

kernel/power/snapshot.c

···
 int create_basic_memory_bitmaps(void)
 {
 	struct memory_bitmap *bm1, *bm2;
-	int error = 0;
+	int error;
 
 	if (forbidden_pages_map && free_pages_map)
 		return 0;