This reverts commit 8497a2cc289f6d991147995507e4efc0ae189147.
The VFS layer is not at all ready for this. Many places in the
code implicitly assume ino_t values will never change. This
functionality is only necessary for live shrinking of partitions,
which is a feature niche enough we do not need to worry about
implementing it in the first round of resizing (if ever.)
92030a4a60