Corrige referencias si no se usa base de datos

pagetop/src/core/module/all.rs

@@ -1,8 +1,13 @@
-use crate::{Lazy, app, run_now, trace};
+use crate::{Lazy, app, trace};
 use crate::core::hook::add_hook;
-use crate::db::*;
 use super::ModuleTrait;
 
+#[cfg(any(feature = "mysql", feature = "postgres", feature = "sqlite"))]
+use crate::{
+    db::*,
+    run_now,
+};
+
 use std::sync::RwLock;
 
 // Enabled modules.

pagetop/src/lib.rs

@@ -6,6 +6,7 @@ pub use doc_comment::doc_comment;
 
 // Local.
 
+#[allow(unused_imports)]
 pub(crate) use futures::executor::block_on as run_now;
 
 // Public APIs.