xfs: remove duplicated xfs_defer.h

Remove duplicated include.

Signed-off-by: YueHaibing <[e-mail]>
Reviewed-by: Darrick J. Wong <[e-mail]>
Signed-off-by: Darrick J. Wong <[e-mail]>

fs/xfs/xfs_trans_bmap.c

···
 #include "xfs_alloc.h"
 #include "xfs_bmap.h"
 #include "xfs_inode.h"
-#include "xfs_defer.h"
 
 /*
  * This routine is called to allocate a "bmap update done"

fs/xfs/xfs_trans_extfree.c

···
 #include "xfs_alloc.h"
 #include "xfs_bmap.h"
 #include "xfs_trace.h"
-#include "xfs_defer.h"
 
 /*
  * This routine is called to allocate an "extent free done"

fs/xfs/xfs_trans_refcount.c

···
 #include "xfs_refcount_item.h"
 #include "xfs_alloc.h"
 #include "xfs_refcount.h"
-#include "xfs_defer.h"
 
 /*
  * This routine is called to allocate a "refcount update done"

fs/xfs/xfs_trans_rmap.c

···
 #include "xfs_rmap_item.h"
 #include "xfs_alloc.h"
 #include "xfs_rmap.h"
-#include "xfs_defer.h"
 
 /* Set the map extent flags for this reverse mapping. */
 static void