Remove animation frame mocks

Author: Tom Gehrke

src/setupTests.js

@@ -5,9 +5,3 @@ import serializer from "enzyme-to-json/serializer";
 configure({ adapter: new Adapter() });
 
 expect.addSnapshotSerializer(serializer);
-
-global.requestAnimationFrame = function(callback) {
-  setTimeout(callback, 0);
-};
-
-global.cancelAnimationFrame = function(callback) {};