Revert "dynamic fsync: add reboot notifier to force flush outstanding data + add kernel panic notifier to force flush outstanding data"

This reverts commit 4e4567973b1edbd966ae45ff8e527c4ccce54c32.
Revert "dyn_sync_cntrl: dynamic sync control 1.1"

This reverts commit 0eaa1af5998b8d0fc10280c2c709c52cd9b8af79.
 hmm ...