unused variable removed

converter-sbml/src/main/java/lcsb/mapviewer/converter/model/sbml/SbmlExporter.java

@@ -90,9 +90,8 @@ public class SbmlExporter {
     SBMLDocument doc = new SBMLDocument(3, 2);
     Model result = doc.createModel(model.getIdModel());
     result.setName(model.getName());
-    Layout layout = null;
     if (usedExtensions.contains(SbmlExtension.LAYOUT)) {
-      layout = createSbmlLayout(model, result);
+      createSbmlLayout(model, result);
     }
 
     MultiModelPlugin multiPlugin = null;