Remove Olivero from comments

Applied the suggestions to use Default Admin over claro.

I did use AI to help with the grep command grep -rni "olivero" /var/www/html/core --include="*.php" --include="*.twig" --include="*.yml" | grep -v "/themes/olivero/" | grep -E "\s*(//|#|\*|{\s*#)"

This still gets findings but reviewing them it appears to be related to tests are being removed/moves in other tickets.

May need one final lap at the very end.

Tiny grammar nitpick; I think "an SVG" is correct over "a SVG"!

Running that I get

core/modules/block/tests/src/Functional/NonDefaultBlockAdminTest.php:48:    // Ensure that the Olivero tab is shown.
core/modules/block/tests/src/Kernel/ConfigActionsTest.php:116:  #[TestWith(["placeBlockInDefaultTheme", "olivero", "header"])]
core/modules/block/tests/src/Kernel/ConfigActionsTest.php:145:  #[TestWith(["placeBlockInDefaultTheme", "olivero"])]
core/modules/config/tests/src/Functional/ConfigImportUITest.php:101:    // Olivero ships with configuration.
core/modules/config/tests/src/Functional/ConfigImportUITest.php:108:    // Set the Olivero theme as default.
core/modules/locale/tests/src/Functional/LocaleThemeInstallTest.php:57:   * The olivero theme ships core.date_format.olivero_medium with langcode
core/modules/locale/tests/src/Functional/LocaleThemeInstallTest.php:62:    // Install olivero via the Appearance UI.
core/modules/locale/tests/src/Functional/LocaleThemeInstallTest.php:70:    // core.date_format.olivero_medium ships with langcode 'en'. Locale's
core/modules/node/tests/src/Functional/NodeDisplayConfigurableTest.php:180:      // @todo Add coverage for olivero after fixing
core/modules/node/tests/src/Functional/NodeDisplayConfigurableTest.php:182:      // ['olivero', 'footer', TRUE],
core/modules/package_manager/tests/src/Kernel/StagedDBUpdateValidatorTest.php:42:    // Olivero are not installed, so they are used to test what happens when
core/modules/search/tests/src/Nightwatch/Tests/Olivero/TestSiteOliveroInstallTestScript.php:22:    // Install required module for the Olivero front page.
core/modules/search/tests/src/Nightwatch/Tests/Olivero/TestSiteOliveroInstallTestScript.php:29:    // Install Olivero and set it as the default theme.
core/modules/search/tests/src/Nightwatch/Tests/Olivero/oliveroRemoveBlockConsoleTest.js:18:          .click('[href*="olivero_search_form_narrow/disable"]')
core/modules/search/tests/src/Nightwatch/Tests/Olivero/oliveroRemoveBlockConsoleTest.js:24:          .click('[href*="olivero_search_form_wide/disable"]');
core/modules/system/tests/modules/olivero_test/src/Hook/OliveroTestThemeHooks.php:10: * Hook implementations for olivero_test.
core/modules/system/tests/modules/olivero_test/src/Hook/OliveroTestThemeHooks.php:30:    $variables['#attached']['library'][] = 'olivero_test/log-errors';
core/modules/system/tests/src/Functional/Menu/BreadcrumbTest.php:84:    // displayed in the admin theme and olivero.
core/modules/system/tests/src/Functional/System/ThemeTest.php:278:    // Visit Olivero's theme settings page to replace the logo.
core/modules/system/tests/src/Functional/System/ThemeTest.php:302:    // Install the Olivero theme.
core/modules/system/tests/src/Functional/System/ThemeTest.php:321:    // Visit Olivero's theme settings page.
core/modules/system/tests/src/Functional/System/ThemeTest.php:355:    // Save Olivero's theme settings which should invalidate the 'rendered'
core/modules/system/tests/src/Functional/System/ThemeTest.php:459:    // Install Olivero and set it as the default theme.
core/modules/system/tests/src/Functional/System/ThemeTest.php:504:    // Install olivero.
core/modules/system/tests/src/Functional/System/ThemeTest.php:515:    // Set olivero as the default theme.
core/modules/system/tests/src/Functional/System/ThemeTest.php:519:    // Check that olivero cannot be uninstalled as it is the default theme.
core/modules/system/tests/src/Functional/System/ThemeTest.php:538:    // Check that olivero can be uninstalled now.
core/modules/system/tests/src/Functional/System/ThemeTest.php:541:    // Uninstall each of the two themes starting with Olivero.
core/tests/Drupal/Nightwatch/Tests/Claro/claroPrimaryTabsTest.js:1:// This test is a duplicate of oliveroPrimaryTabsTest.js tagged for claro
core/tests/Drupal/TestSite/TestSiteClaroInstallTestScript.php:23:    // Install required module for the Olivero front page.
core/tests/Drupal/TestSite/TestSiteClaroInstallTestScript.php:28:    // Install Claro instead of Olivero and set it as the default theme.

Spot checking a few I think they're related to tests. So may be good to do one more lap after all the tests land too.

Only found one very minor nit. I think it looks good once that is fixed.

The Needs Review Queue Bot tested this issue. It no longer applies to Drupal core. Therefore, this issue status is now "Needs work".

This does not mean that the patch necessarily needs to be re-rolled or the MR rebased. Read the Issue Summary, the issue tags and the latest discussion here to determine what needs to be done.

Consult the Drupal Contributor Guide to find step-by-step guides for working with issues.

1 tiny grammar nit, ok to self RTBC.

lgtm