chore: remove unnecessary lines

Author: Akshat55

src/treeview/stories/app-treeview-icons.component.ts

@@ -16,7 +16,6 @@ import { Node } from "../tree-node.types";
 	`
 })
 export class IconTreeviewDemoComponent implements AfterViewInit {
-
 	tree: Node[] = [];
 
 	@ViewChild("document") documentIcon: TemplateRef<any>;

src/treeview/treeview.component.spec.ts

@@ -16,7 +16,6 @@ import { TreeNodeComponent } from "./tree-node.component";
 	`
 })
 class TreeviewTestComponent {
-
 	tree = [
 		{
 			id: "1",

src/treeview/treeview.stories.ts

@@ -168,21 +168,6 @@ const nodes = [
 	}
 ];
 
-function updateNode(node) {
-	if (node.children) {
-		node.icon = "folder";
-		node.children.forEach(childNode => updateNode(childNode));
-	} else {
-		node.icon = "document";
-	}
-
-	return node;
-}
-
-function updateTree(tree) {
-	const newTree = cloneDeep(tree);
-	return newTree.map(node => updateNode(node));
-}
 
 const Template = (args) => ({
 	props: args,