WIP: refactor: remove unused imports

Author: Felipe Lang

src/test/java/com/flowingcode/vaadin/addons/dayofweekselector/DayOfWeekSelectorDemo.java

@@ -22,8 +22,6 @@
 import com.flowingcode.vaadin.addons.demo.DemoSource;
 import com.vaadin.flow.component.button.Button;
 import com.vaadin.flow.component.html.Div;
-import com.vaadin.flow.component.orderedlayout.FlexComponent;
-import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
 import com.vaadin.flow.component.orderedlayout.VerticalLayout;
 import com.vaadin.flow.router.PageTitle;
 import com.vaadin.flow.router.Route;