Merge branch 'text-tree-renderer'

Closes #41

Author: oowekyala

src/main/java/net/sourceforge/pmd/util/fxdesigner/model/export/TreeRendererRegistry.java

@@ -9,7 +9,6 @@
 
 import net.sourceforge.pmd.util.fxdesigner.app.ApplicationComponent;
 import net.sourceforge.pmd.util.fxdesigner.app.DesignerRoot;
-import net.sourceforge.pmd.util.fxdesigner.util.TextTreeRenderer;
 import net.sourceforge.pmd.util.treeexport.TreeRenderers;
 
 import javafx.collections.FXCollections;
@@ -19,13 +18,11 @@ public class TreeRendererRegistry implements ApplicationComponent {
 
     private final DesignerRoot root;
 
-    private Map<String, LiveTreeRenderer> registry = new HashMap<>();
+    private final Map<String, LiveTreeRenderer> registry = new HashMap<>();
 
     public TreeRendererRegistry(DesignerRoot root) {
         this.root = root;
 
-        TreeRenderers.register(TextTreeRenderer.DESCRIPTOR);
-
         TreeRenderers.registeredRenderers().forEach(it -> registry.put(it.id(), new LiveTreeRenderer(root, it)));
     }