use perf_hooks

Summary:
We were using `window.performance` to measure performance. This was because the equivalent node.js API `perf_hooks` wasn't available in the electron version we were using back then.
However, `perf_hooks` has landed in electron meanwhile, so I am moving to this API, as it works for the headless version and jest tests, too.

This allows us to delete the babel transform that was used for node-based tests, where the browser API was replaced with the node API

Reviewed By: jknoxville

Differential Revision: D13860133

fbshipit-source-id: cf1395004fac046dd55751ff465af494173b2cbf

src/utils/performance.js

@@ -1,24 +0,0 @@
-/**
- * Copyright 2018-present Facebook.
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- * @format
- */
-
-let debugId = 0;
-
-export function mark(): string {
-  const id = String(debugId++);
-  if (typeof performance === 'object') {
-    performance.mark(id);
-  }
-  return id;
-}
-
-export function measure(id: string, name: string) {
-  if (typeof performance === 'object') {
-    performance.measure(name, id);
-    performance.clearMeasures(id);
-    performance.clearMarks(id);
-  }
-}