Remove unused logic and feature flag check

appinventor/appengine/src/com/google/appinventor/client/boxes/SourceStructureBox.java

@@ -42,9 +42,7 @@ public class SourceStructureBox extends Box implements ISourceStructureBox {
         false); // removable
 
     // Creates the child instance according to the enabled features.
-    SUBINSTANCE = AppInventorFeatures.enableFutureFeatures()
-            ? new SourceStructureBoxNew(this)
-            : new SourceStructureBoxClassic();
+    SUBINSTANCE = new SourceStructureBoxFilter(this);
 
     setContent(SUBINSTANCE.getSourceStructureExplorer());
   }

appinventor/appengine/src/com/google/appinventor/client/boxes/SourceStructureBoxNew.java → appinventor/appengine/src/com/google/appinventor/client/boxes/SourceStructureBoxFilter.java

@@ -23,16 +23,16 @@ import static com.google.appinventor.client.Ode.MESSAGES;
 /**
  * Box implementation for source structure explorer (new style, with filters).
  */
-public final class SourceStructureBoxNew implements ISourceStructureBox {
+public final class SourceStructureBoxFilter implements ISourceStructureBox {
   private Integer view = 1;
 
   private final DropDownButton dropDownButton;
-  private final SourceStructureExplorer sourceStructureExplorer = new SourceStructureExplorer(false);
+  private final SourceStructureExplorer sourceStructureExplorer = new SourceStructureExplorer();
 
   /**
    * Creates new source structure explorer box.
    */
-  public SourceStructureBoxNew(SourceStructureBox container) {
+  public SourceStructureBoxFilter(SourceStructureBox container) {
     super();
 
     List<DropDownItem> items = new ArrayList<>();
@@ -105,7 +105,7 @@ public final class SourceStructureBoxNew implements ISourceStructureBox {
       MockForm form = ((YaFormEditor) Ode.getInstance().getCurrentFileEditor()).getForm();
       sourceStructureExplorer.updateTree(form.buildComponentsTree(view),
           form.getForm().getLastSelectedComponent().getSourceStructureExplorerItem());
-      SourceStructureBoxNew.this.setView(view);
+      SourceStructureBoxFilter.this.setView(view);
 
       updateSourceDropdownButtonCaption();
     }

appinventor/appengine/src/com/google/appinventor/client/explorer/SourceStructureExplorer.java

@@ -68,14 +68,10 @@ public class SourceStructureExplorer extends Composite {
     }
   }
 
-  public SourceStructureExplorer() {
-    this(true);
-  }
-
   /**
    * Creates a new source structure explorer.
    */
-  public SourceStructureExplorer(boolean includeButtonPanel) {
+  public SourceStructureExplorer() {
     // Initialize UI elements
     tree = new EventCaptureTree(Ode.getImageBundle());
     tree.setAnimationEnabled(true);
@@ -178,12 +174,6 @@ public class SourceStructureExplorer extends Composite {
 
     VerticalPanel panel = new VerticalPanel();
     panel.add(scrollPanel);
-    // TODO(diego@kodular.io): With App Inventor's current layout, as of now this is the only place to
-    //  render these buttons...
-    // if (includeButtonPanel) {
-      panel.add(new Label());
-      panel.add(buttonPanel);
-    // }
     panel.setCellHorizontalAlignment(buttonPanel, HorizontalPanel.ALIGN_CENTER);
     initWidget(panel);
   }