chore(frontends/smt2/parser): fix warning
chore(frontends/smt2/parser): fix warning

digama0/lean,Kha/lean,Kha/lean,leanprover-community/lean,leanprover/lean,fgdorais/lean,rlewis1988/lean,soonhokong/lean-windows,rlewis1988/lean,soonhokong/lean-windows,fgdorais/lean,digama0/lean,dselsam/lean,fgdorais/lean,fgdorais/lean,johoelzl/lean,leanprover/lean,leodemoura/lean,dselsam/lean,avigad/lean,leanprover-community/lean,fgdorais/lean,fpvandoorn/lean,leodemoura/lean,dselsam/lean,leanprover/lean,leanprover-community/lean,johoelzl/lean,leanprover/lean,leanprover-community/lean,Kha/lean,leodemoura/lean,avigad/lean,dselsam/lean,avigad/lean,rlewis1988/lean,soonhokong/lean-windows,soonhokong/lean-osx,soonhokong/lean-osx,digama0/lean,soonhokong/lean-osx,fpvandoorn/lean,dselsam/lean,fgdorais/lean,digama0/lean,johoelzl/lean,leanprover-community/lean,soonhokong/lean-osx,leanprover/lean,digama0/lean,avigad/lean,leodemoura/lean,soonhokong/lean-windows,soonhokong/lean-osx,rlewis1988/lean,johoelzl/lean,leanprover-community/lean,avigad/lean,leodemoura/lean,fpvandoorn/lean,johoelzl/lean,Kha/lean,fpvandoorn/lean,fpvandoorn/lean,Kha/lean,avigad/lean,soonhokong/lean-windows,digama0/lean,leodemoura/lean,Kha/lean,fpvandoorn/lean,leanprover/lean,rlewis1988/lean,johoelzl/lean,rlewis1988/lean,dselsam/lean