refactor(library/aliases): cleanup

src/frontends/lean/parser.cpp

@@ -741,6 +741,13 @@ level parser::parse_level_id() {
     next();
     if (auto it = m_local_level_decls.find(id))
         return *it;
+
+    for (name const & ns : get_namespaces(m_env)) {
+        auto new_id = ns + id;
+        if (!ns.is_anonymous() && m_env.is_universe(new_id))
+            return mk_global_univ(new_id);
+    }
+
     if (m_env.is_universe(id))
         return mk_global_univ(id);
     if (auto it = get_level_alias(m_env, id))

src/library/aliases.cpp

@@ -106,8 +106,6 @@ struct aliases_ext : public environment_extension {
         aliases_ext ext = get_extension(env);
         ext.push(k != scope_kind::Namespace);
         environment new_env = update(env, ext);
-        if (!::lean::in_section(new_env))
-            new_env = add_aliases(new_env, get_namespace(new_env), name());
         return new_env;
     }