chore: remove temporary H5 cache diagnostics

test/widget_test.dart

@@ -51,7 +51,7 @@ void main() {
   test('rewrites legacy H5 host main-frame URLs to the canonical host', () {
     final uri = Uri.parse(
       AppConfig.canonicalizeMainFrameUrl(
-        'https://h5-im.imharry.work/login?from=runtime'
+        'https://h5-test.imharry.work/login?from=runtime'
         '&shell_app_name=Old#shell_app_logo=old',
       ),
     );
@@ -60,7 +60,6 @@ void main() {
     expect(uri.host, 'h5-im.imharry.work');
     expect(uri.path, '/login');
     expect(uri.queryParameters['from'], 'runtime');
-    expect(uri.queryParameters.containsKey('_h5_t'), isTrue);
     expect(uri.queryParameters.containsKey('shell_app_name'), isFalse);
     expect(Uri.splitQueryString(uri.fragment).containsKey('shell_app_logo'),
         isFalse);