quectel: remove custom power operation synchronization logic

The power up and down operations are already synchronized at
interface level, so there is already a guarantee that they won't
happen at the same time.

For the reset and power off operations, it is assumed that the modem
will either reset or power off, so there should be no need to sync
those operations with others, as the modem object will eventually go
away altogether in both cases.

0 files changed, 0 insertions, 0 deletions