Do not lift subterms in the cut tactic.
Do not lift subterms in the cut tactic.

We know statically that these terms are closed, because they live in
a var-only goal context. No need to lift them thus, it's a no-op.

Zimmi48/coq,Zimmi48/coq,ejgallego/coq,ejgallego/coq,coq/coq,SkySkimmer/coq,SkySkimmer/coq,coq/coq,Zimmi48/coq,coq/coq,ejgallego/coq,SkySkimmer/coq,SkySkimmer/coq,Zimmi48/coq,ejgallego/coq,coq/coq