test: Remove test playgrounds (#23203)

Author: lyndsiWilliams

superset-frontend/src/components/Datasource/DatasourceEditor.test.jsx

@@ -107,7 +107,6 @@ describe('DatasourceEditor', () => {
     });
 
     userEvent.click(getToggles[0]);
-    screen.logTestingPlaygroundURL();
     const deleteButtons = screen.getAllByRole('button', {
       name: /delete item/i,
     });

superset-frontend/src/dashboard/components/RefreshIntervalModal.test.tsx

@@ -219,7 +219,6 @@ describe('RefreshIntervalModal - RTL', () => {
     await openRefreshIntervalModal();
     await displayOptions();
 
-    screen.logTestingPlaygroundURL();
     // Select a new interval and click save
     userEvent.click(screen.getByText(/10 seconds/i));
     userEvent.click(screen.getByRole('button', { name: /save/i }));