feat(builtin/tactic): add simp_no_assump tactic
feat(builtin/tactic): add simp_no_assump tactic

Signed-off-by: Leonardo de Moura <7610bae85f2b530654cc716772f1fe653373e892@microsoft.com>

soonhokong/travis_test,levnach/lean,fgdorais/lean,leanprover-community/lean,fpvandoorn/lean,soonhokong/lean-osx,digama0/lean,dselsam/lean,avigad/lean,rlewis1988/lean,fpvandoorn/lean2,c-cube/lean,javra/lean,leodemoura/lean,dselsam/lean,fpvandoorn/lean2,soonhokong/travis_test,avigad/lean,javra/lean,codyroux/lean0.1,rlewis1988/lean,javra/lean,htzh/lean,leanprover-community/lean,eigengrau/lean,soonhokong/lean-windows,johoelzl/lean,johoelzl/lean,soonhokong/lean-windows,leodemoura/lean,Kha/lean,leanprover/lean,eigengrau/lean,levnach/lean,fpvandoorn/lean2,johoelzl/lean,johoelzl/lean,rlewis1988/lean,rlewis1988/lean,avigad/lean,leanprover/lean,Kha/lean,htzh/lean,soonhokong/lean-osx,levnach/lean,htzh/lean,Kha/lean,rlewis1988/lean,fgdorais/lean,fpvandoorn/lean,sp3ctum/lean,digama0/lean,soonhokong/lean,fpvandoorn/lean,rlewis1988/lean,sp3ctum/lean,c-cube/lean,javra/lean,leodemoura/lean,leanprover-community/lean,digama0/lean,soonhokong/lean-windows,UlrikBuchholtz/lean,codyroux/lean0.1,javra/lean,digama0/lean,fgdorais/lean,fpvandoorn/lean2,htzh/lean,codyroux/lean0.1,fpvandoorn/lean2,UlrikBuchholtz/lean,avigad/lean,dselsam/lean,UlrikBuchholtz/lean,c-cube/lean,c-cube/lean,levnach/lean,avigad/lean,leanprover/lean,soonhokong/travis_test,fpvandoorn/lean,soonhokong/lean,soonhokong/lean-osx,fpvandoorn/lean,UlrikBuchholtz/lean,leodemoura/lean,avigad/lean,leanprover-community/lean,UlrikBuchholtz/lean,leodemoura/lean,sp3ctum/lean,soonhokong/lean-windows,sp3ctum/lean,johoelzl/lean,leanprover/lean,leanprover/lean,fgdorais/lean,levnach/lean,htzh/lean,Kha/lean,codyroux/lean0.1,leanprover-community/lean,fgdorais/lean,Kha/lean,soonhokong/lean,digama0/lean,eigengrau/lean,sp3ctum/lean,leodemoura/lean,digama0/lean,c-cube/lean,fpvandoorn/lean,johoelzl/lean,Kha/lean,soonhokong/lean-osx,soonhokong/travis_test,soonhokong/lean-windows,soonhokong/lean,dselsam/lean,leanprover-community/lean,dselsam/lean,soonhokong/lean-osx,leanprover/lean,eigengrau/lean,soonhokong/lean,fgdorais/lean,dselsam/lean,eigengrau/lean