Deadwood are players that do not contribute whatsoever to the team's progress.
The only two players Ole has gotten rid of that constitute 'deadwood' are Darmian and Sanchez, and the latter is coming back next summer anyway for his 400k a week. Smalling, before our new signing, was our best CB in my opinion but that's up for debate I accept - either way, if he is deadwood than what is Jones, Rojo or Bailly considered to be? They are all still here.
Lukaku contributed 20 goals and about 12 goals last season, that is not deadwood when it isn't replaced.
Herrera was our second best midfielder who played crucial parts in crucial games during his career here, not deadwood.
Fellaini saved our skin numerous times with last ditch goals, okay he isn't the sort of player we wanted here and we're all glad he's gone but if he's considered to be deadwood, then what does that make guys Like Matic, Fred, Pereira and McTominnay who are all still here playing every week?
The deadwood thing is actually a bit of a myth, especially when you bear in mind the high likelihood that Pogba will leave next summer. Is he deadwood as well, then?
Mata, Young, Lingard, Rojo, Matic, Jones, Pereira. Those are players that are regularly getting game-time for United STILL this season and those are players that do not contribute a thing - THESE are deadwood.