>>530687897
R.U.S.E. was pulled from Steam because the licence for the Willys Jeep ran out (this might also have just been EA being EA)
I can't think of a single moment this has happened otherwise. Sometimes you hear things about fighter planes not being in a game because of licensing issues but it's always to explain their absence, never retrospective. The big example was the Panavia Tornado in War Thunder, which got added a few years ago meaning it's all probably bullshit.