Oh, that was not intentionally removed just to remove it. I replaced it with the stormtroopers doing an about face, because otherwise we won’t be able to see this happen. I felt it was more elegant to replace their salute with their about face, rather than have the salute (which only ever is shown the one time) and then not see them get to the position they are in a few shots later.
In other words, it’s tied directly in to removing Hux’s line, “Fire!”