Revert "Update focus management expectation in test"

This reverts commit 1d1f3db.

Author: jperals

src/app-layout/__tests__/split-panel.test.tsx

@@ -135,7 +135,7 @@ describeEachAppLayout({ sizes: ['desktop'] }, ({ theme }) => {
       );
       wrapper.findSplitPanelOpenButton()!.click();
       wrapper.findSplitPanel()!.findCloseButton()!.click();
-      expect(wrapper.findSplitPanel()!.findOpenButton()!.getElement()).toHaveFocus();
+      expect(wrapper.findSplitPanelOpenButton()!.getElement()).toHaveFocus();
     });
 
     test(`Moves focus to the slider when focusSplitPanel() is called`, () => {