test(core): remove redundant change detection configuration

OnPush is now the default change detection strategy, so the explicit test and example configuration is no longer needed.

packages/core/test/linker/view_injector_integration_spec.ts

@@ -9,7 +9,6 @@
 import {expect} from '@angular/private/testing/matchers';
 import {
   Attribute,
-  ChangeDetectionStrategy,
   ChangeDetectorRef,
   Component,
   createComponent as coreCreateComponent,
@@ -248,7 +247,6 @@ class DirectiveNeedsChangeDetectorRef {
 @Component({
   selector: '[componentNeedsChangeDetectorRef]',
   template: '{{counter}}',
-  changeDetection: ChangeDetectionStrategy.OnPush,
   standalone: false,
 })
 class PushComponentNeedsChangeDetectorRef {

packages/examples/core/ts/change_detect/change-detection.ts

@@ -5,21 +5,13 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.dev/license
  */
-import {
-  ChangeDetectionStrategy,
-  ChangeDetectorRef,
-  Component,
-  effect,
-  input,
-  signal,
-} from '@angular/core';
+import {ChangeDetectorRef, Component, effect, input, signal} from '@angular/core';
 import {FormsModule} from '@angular/forms';
 
 // #docregion mark-for-check
 @Component({
   selector: 'app-root',
   template: `Number of ticks: {{ numberOfTicks }}`,
-  changeDetection: ChangeDetectionStrategy.OnPush,
 })
 class AppComponent {
   numberOfTicks = 0;