mm: page_alloc: remove alloc_contig_dump_pages() stub

DEFINE_DYNAMIC_DEBUG_METADATA and DYNAMIC_DEBUG_BRANCH already has stub
definitions without dynamic debug feature, remove unnecessary
alloc_contig_dump_pages() stub.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Kefeng Wang <[e-mail]>
Reviewed-by: Mike Rapoport (IBM) <[e-mail]>
Cc: David Hildenbrand <[e-mail]>
Cc: "Huang, Ying" <[e-mail]>
Cc: Iurii Zaikin <[e-mail]>
Cc: Kees Cook <[e-mail]>
Cc: Len Brown <[e-mail]>
Cc: Luis Chamberlain <[e-mail]>
Cc: Oscar Salvador <[e-mail]>
Cc: Pavel Machek <[e-mail]>
Cc: Rafael J. Wysocki <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

mm/page_alloc.c

···
 }
 
 #ifdef CONFIG_CONTIG_ALLOC
-#if defined(CONFIG_DYNAMIC_DEBUG) || \
-	(defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
 /* Usage: See admin-guide/dynamic-debug-howto.rst */
 static void alloc_contig_dump_pages(struct list_head *page_list)
 {
···
 			dump_page(page, "migration failure");
 	}
 }
-#else
-static inline void alloc_contig_dump_pages(struct list_head *page_list)
-{
-}
-#endif
 
 /* [start, end) must belong to a single zone. */
 int __alloc_contig_migrate_range(struct compact_control *cc,