Revert "sync.c: add a module_param to fsync() calls. fsync is still disabled by default but users will have the choice of having a faster build or a safer build (for data integrity). Props for simms for busting my ass off with this one :)"

This reverts commit 7669540f4649230b40953a4dc3988178d33995e0.

boype: Only reverted in this branch, since in the future it will still (and only) be available in the extended kernel version