Remove traverse-edge testcase file

Didn't make much sense

test/traverse-edge.spec.tsx

@@ -1,32 +0,0 @@
-// import * as React from "react";
-
-// Import stuff from src
-import { traverse } from "../src";
-
-// Import test helpers and sample components
-import { mountAndGetRootNode } from "./utils/mountInEnzyme";
-
-describe("traverse", () => {
-  let container: HTMLDivElement;
-
-  beforeEach(() => {
-    container = document.body.appendChild(document.createElement("div"));
-  });
-
-  afterEach(() => {
-    document.body.removeChild(container);
-  });
-
-  describe("edge cases", () => {
-    it("should work for string nodes", () => {
-      const rootNode = mountAndGetRootNode('div', container);
-      const mockCallback = jest.fn();
-
-      traverse(rootNode, mockCallback);
-
-      // Can't be zero, in any case
-      expect(mockCallback.mock.calls.length).not.toBe(0);
-      expect(mockCallback.mock.calls.length).toBe(1);
-    });
-  });
-});