fix(library/tactic/simplify): missing constraints
fix(library/tactic/simplify): missing constraints

This bug was introduced in the previous commit.

dselsam/lean,leodemoura/lean,avigad/lean,avigad/lean,johoelzl/lean,avigad/lean,digama0/lean,leanprover-community/lean,dselsam/lean,leanprover/lean,leanprover/lean,fpvandoorn/lean,leodemoura/lean,fpvandoorn/lean,Kha/lean,Kha/lean,rlewis1988/lean,leanprover-community/lean,Kha/lean,johoelzl/lean,avigad/lean,Kha/lean,johoelzl/lean,dselsam/lean,dselsam/lean,rlewis1988/lean,avigad/lean,leodemoura/lean,leodemoura/lean,dselsam/lean,leanprover/lean,fpvandoorn/lean,leodemoura/lean,johoelzl/lean,leanprover-community/lean,rlewis1988/lean,Kha/lean,rlewis1988/lean,avigad/lean,fpvandoorn/lean,leanprover/lean,digama0/lean,leanprover/lean,Kha/lean,johoelzl/lean,rlewis1988/lean,leodemoura/lean,leanprover-community/lean,digama0/lean,dselsam/lean,leanprover/lean,leanprover-community/lean,rlewis1988/lean,digama0/lean,fpvandoorn/lean,digama0/lean,leanprover-community/lean,fpvandoorn/lean,digama0/lean,johoelzl/lean