Revert "fs/dyn_sync_cntrl: add kernel panic notifier to force flush outstanding data"

This reverts commit 2e98a3669c8ab7fcf41214a1f4de10f5aee93d6e.
Revert "fs/dyn_sync_cntrl: add reboot notifier to force flush outstanding data"

This reverts commit 21187be921086aac19a8a6dee4c1f312254cb3c4.
Revert "fs: sync: Don't disable fdatasync()"

This reverts commit 3868eac1942a7b77e4c1a37de4fe050e2f2ff33a.
Revert "fs/dyn_sync_cntrl: add some cache optimizations"

This reverts commit 3a24b38c61407d4431f87ca336c24aa8810dde3a.
Revert "fs/dyn_sync_cntrl: check dyn fsync control's active prior to performing fsync ops"

This reverts commit 5ad2553951b37f8085cbd32a72dde0eb58dc23d2.
Revert "fs/dyn_sync_cntrl: dynamic sync control"

This reverts commit 0123f437bf7701c6e7373895ba4d9f34cf631c3f.