Cleanup after enabling experiments.

app/lib/frontend/handlers/experimental.dart

@@ -9,13 +9,7 @@ import '../../shared/cookie_utils.dart';
 typedef PublicFlag = ({String name, String description});
 
 const _publicFlags = <PublicFlag>{
-  (name: 'dark', description: 'Dark mode'),
-  (name: 'search-completion', description: 'Completions for the search bar'),
   (name: 'search-topics', description: 'Show matching topics when searching'),
-  (
-    name: 'download-counts-version-chart',
-    description: 'Show downloads counts version chart'
-  ),
 };
 
 final _allFlags = <String>{
@@ -92,14 +86,10 @@ class ExperimentalFlags {
     return params;
   }
 
-  bool get isSearchCompletionEnabled => true;
   bool get isSearchTopicsEnabled => isEnabled('search-topics');
 
-  bool get isDarkModeEnabled => true;
   bool get isDarkModeDefault => isEnabled('dark-as-default');
 
-  bool get showDownloadCountsVersionChart => true;
-
   String encodedAsCookie() => _enabled.join(':');
 
   @override

app/lib/frontend/templates/views/pkg/score_tab.dart

@@ -14,7 +14,6 @@ import 'package:pub_dev/shared/utils.dart';
 import '../../../../scorecard/models.dart' hide ReportStatus;
 import '../../../../shared/urls.dart' as urls;
 import '../../../dom/dom.dart' as d;
-import '../../../request_context.dart';
 import '../../../static_files.dart';
 
 /// Renders the score page content.
@@ -95,8 +94,7 @@ d.Node scoreTabNode({
           d.text(' for details.'),
         ],
       ),
-    if (card.weeklyVersionDownloads != null &&
-        requestContext.experimentalFlags.showDownloadCountsVersionChart)
+    if (card.weeklyVersionDownloads != null)
       _downloadsChart(card.weeklyVersionDownloads!),
   ]);
 }

app/lib/frontend/templates/views/shared/search_banner.dart

@@ -5,7 +5,6 @@
 import 'dart:convert';
 
 import 'package:_pub_shared/data/completion.dart';
-import 'package:pub_dev/frontend/request_context.dart';
 
 import '../../../dom/dom.dart' as d;
 import '../../../static_files.dart' show staticUrls;
@@ -36,8 +35,7 @@ d.Node searchBannerNode({
         value: queryText,
         attributes: {
           'title': 'Search',
-          if (requestContext.experimentalFlags.isSearchCompletionEnabled)
-            'data-widget': 'completion',
+          'data-widget': 'completion',
           'data-completion-src': '/api/search-input-completion-data',
           'data-completion-class': 'search-completion',
         },

app/lib/frontend/templates/views/shared/site_header.dart

@@ -2,8 +2,6 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'package:pub_dev/frontend/request_context.dart';
-
 import '../../../../account/models.dart' show SessionData;
 import '../../../../shared/urls.dart' as urls;
 import '../../../dom/dom.dart' as d;
@@ -116,24 +114,17 @@ d.Node siteHeaderNode({
             _userBlock(userSession),
         ],
       ),
-      _themeSwitcher(),
+      // TODO: consider using Material symbols similar to dartdoc:
+      // <span id="dark-theme-button" class="material-symbols-outlined">dark_mode</span>
+      // <span id="light-theme-button" class="material-symbols-outlined">light_mode</span>
+      d.button(
+        classes: ['-pub-theme-toggle'],
+        ariaLabel: 'light/dark theme toggle',
+      ),
     ],
   );
 }
 
-d.Node _themeSwitcher() {
-  // <span id="dark-theme-button" class="material-symbols-outlined">dark_mode</span>
-  // <span id="light-theme-button" class="material-symbols-outlined">light_mode</span>
-  if (requestContext.experimentalFlags.isDarkModeEnabled) {
-    return d.fragment([
-      d.button(
-          classes: ['-pub-theme-toggle'], ariaLabel: 'light/dark theme toggle'),
-    ]);
-  } else {
-    return d.fragment([]);
-  }
-}
-
 d.Node _userBlock(SessionData userSession) {
   return d.div(
     classes: ['nav-container', 'nav-profile-container', 'hoverable'],

app/test/search/backend_test.dart

@@ -17,7 +17,7 @@ void main() {
       final descr = await searchBackend.fetchSdkLibraryDescriptions(
         baseUri: index.baseUri,
         libraryRelativeUrls: {
-          'dart:async': 'dart-async/dart-async-library.html',
+          'dart:async': 'dart-async/index.html',
         },
       );
       expect(descr, {

pkg/pub_integration/test/search_completition_test.dart

@@ -44,8 +44,6 @@ void main() {
       final user = await fakeTestScenario.createAnonymousTestUser();
 
       await user.withBrowserPage((page) async {
-        await page.gotoOrigin('/experimental?search-completion=1');
-
         await page.gotoOrigin('/');
         await page.keyboard.type('is:un');
         await Future.delayed(Duration(milliseconds: 200));
@@ -59,8 +57,6 @@ void main() {
       });
 
       await user.withBrowserPage((page) async {
-        await page.gotoOrigin('/experimental?search-completion=1');
-
         await page.gotoOrigin('/packages?q=abc');
         await page.focus('input[name="q"]');
         // go to the end of the input field and start typing

pkg/pub_integration/test/theme_switch_test.dart

@@ -41,8 +41,6 @@ void main() {
 
       // test keyboard navigation
       await user.withBrowserPage((page) async {
-        await page.gotoOrigin('/experimental?dark=1');
-
         Future<void> expectDarkTheme() async {
           expect(await page.$OrNull('body.light-theme'), isNull);
           expect(await page.$OrNull('body.dark-theme'), isNotNull);