AST: Relax assertions in PackType::get()

Author: slavapestov

lib/AST/ASTContext.cpp

@@ -3258,11 +3258,6 @@ PackType *PackType::get(const ASTContext &C, ArrayRef<Type> elements) {
   RecursiveTypeProperties properties;
   bool isCanonical = true;
   for (Type eltTy : elements) {
-    assert(!eltTy->isTypeParameter() ||
-           !eltTy->getRootGenericParam()->isParameterPack() &&
-           "Pack type parameter outside of a pack expansion");
-    assert(!eltTy->is<PackArchetypeType>() &&
-           "Pack type archetype outside of a pack expansion");
     assert(!eltTy->is<PackType>() &&
            "Cannot have pack directly inside another pack");