Remove unused variable declaration for TreeNodeInfo in tests

Author: aasimkhan30

test/unit/treeNodeInfo.test.ts

@@ -7,8 +7,6 @@ import { expect } from "chai";
 import { TreeNodeInfo } from "../../src/objectExplorer/nodes/treeNodeInfo";
 
 suite("TreeNodeInfo", () => {
-    let treeNodeInfo: TreeNodeInfo;
-
     test("When creating multiple TreeNodeInfo in quick succession, the nodePath should be unique", () => {
         const node1 = new TreeNodeInfo(
             "node_label",