xfs: remove xfs_inew_wait

mainline inclusion
from mainline-v5.16-rc2
commit 1090427b
category: bugfix
bugzilla: 187526,https://gitee.com/openeuler/kernel/issues/I4KIAO

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1090427bf18f9835b3ccbd36edf43f2509444e27



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With the remove of xfs_dqrele_all_inodes, xfs_inew_wait and all the
infrastructure used to wake the XFS_INEW bit waitqueue is unused.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 777eb1fa ("xfs: remove xfs_dqrele_all_inodes")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Guo Xuenan <guoxuenan@huawei.com>
Conflicts:
	fs/xfs/xfs_inode.h
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>