skip non-kcl

rust/kcl-lib/src/walk/import_graph.rs

@@ -185,10 +185,9 @@ pub(crate) async fn import_universe(
                 }));
             };
             let ModuleRepr::Kcl(program, _) = &module_info.repr else {
-                return Err(KclError::Internal(KclErrorDetails {
-                    message: format!("Module {} is not a KCL module", module_id),
-                    source_ranges: vec![import_stmt.into()],
-                }));
+                // if it's not a KCL module we can skip it since it has no
+                // dependencies.
+                continue;
             };
             program.clone()
         };