xfs: Remove duplicate include

Clean up the following includecheck warning:

./fs/xfs/xfs_attr_item.c: xfs_inode.h is included more than once.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Dave Chinner <david@fromorbit.com>

fs/xfs/xfs_attr_item.c

@@ -22,7 +22,6 @@
 #include "xfs_attr.h"
 #include "xfs_attr_item.h"
 #include "xfs_trace.h"
-#include "xfs_inode.h"
 #include "xfs_trans_space.h"
 #include "xfs_errortag.h"
 #include "xfs_error.h"