It's a shame that so many cabin crew are so gullible, because it means that people like teemok can easily cause chaos with their unfounded speculation and rumourmongering.
The role of the onboard service manager will always exist so long as passenger aircraft carry cabin crew. The title in individual airlines may be different - and may change in any given airline, as it has in Virgin (from In-Flight Supervisor to Flight Service Manager). Someone has to be responsible for the conduct and organisation of the cabin crew onboard, with authority (delegated by law from the Captain) to take whatever measures necessary to ensure the safety of the passengers, crew and aircraft. That role cannot, and will not, be made redundant. Therefore there can be no 'plan' to remove FSM's from the aircraft. Period.
The total number of crew on board can be reduced; the number of mid-ranking crew (CSSs) can be reduced, but someone has to be in charge. That is the FSM - or whatever other title the airline wishes to use.
Ignore teemok. He or she is a troublemaking troll.