[go_router_builder] Removes presubmit only flag (#2957)

diff --git a/packages/go_router_builder/example/dart_test.yaml b/packages/go_router_builder/example/dart_test.yaml
deleted file mode 100644
index 46bf961..0000000
--- a/packages/go_router_builder/example/dart_test.yaml
+++ /dev/null
@@ -1,4 +0,0 @@
-# https://github.com/dart-lang/test/tree/master/pkgs/test#whole-package-configuration
-tags:
-  presubmit-only:
-    skip: "Should only be run during presubmit"
diff --git a/packages/go_router_builder/example/test/ensure_build_test.dart b/packages/go_router_builder/example/test/ensure_build_test.dart
index 4cdea24..a39670e 100644
--- a/packages/go_router_builder/example/test/ensure_build_test.dart
+++ b/packages/go_router_builder/example/test/ensure_build_test.dart
@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-@Tags(<String>['presubmit-only'])
 import 'package:build_verify/build_verify.dart';
 import 'package:flutter_test/flutter_test.dart';