fix(material/stepper): remove deprecated factory functions

Removes factory functions that we had marked as deprecated for v21. These functions aren't necessary since we switched to standalone.

BREAKING CHANGE:
* `MAT_STEPPER_INTL_PROVIDER` has been removed.
* `MAT_STEPPER_INTL_PROVIDER_FACTORY` has been removed.

Author: crisbeto

goldens/material/stepper/index.api.md

@@ -25,24 +25,13 @@ import * as i3 from '@angular/cdk/portal';
 import { NgForm } from '@angular/forms';
 import { OnDestroy } from '@angular/core';
 import { OnInit } from '@angular/core';
-import { Optional } from '@angular/core';
 import { QueryList } from '@angular/core';
 import { StepperOrientation } from '@angular/cdk/stepper';
 import { StepState } from '@angular/cdk/stepper';
 import { Subject } from 'rxjs';
 import { TemplatePortal } from '@angular/cdk/portal';
 import { TemplateRef } from '@angular/core';
 
-// @public @deprecated
-export const MAT_STEPPER_INTL_PROVIDER: {
-    provide: typeof MatStepperIntl;
-    deps: Optional[][];
-    useFactory: typeof MAT_STEPPER_INTL_PROVIDER_FACTORY;
-};
-
-// @public @deprecated
-export function MAT_STEPPER_INTL_PROVIDER_FACTORY(parentIntl: MatStepperIntl): MatStepperIntl;
-
 // @public (undocumented)
 export class MatStep extends CdkStep implements ErrorStateMatcher, AfterContentInit, OnDestroy {
     color: ThemePalette;

src/material/stepper/stepper-intl.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.dev/license
  */
 
-import {Injectable, Optional, SkipSelf} from '@angular/core';
+import {Injectable} from '@angular/core';
 import {Subject} from 'rxjs';
 
 /** Stepper data that is required for internationalization. */
@@ -27,23 +27,3 @@ export class MatStepperIntl {
   /** Label that is used to indicate step as editable to screen readers. */
   editableLabel: string = 'Editable';
 }
-
-/**
- * @docs-private
- * @deprecated No longer used, will be removed.
- * @breaking-change 21.0.0
- */
-export function MAT_STEPPER_INTL_PROVIDER_FACTORY(parentIntl: MatStepperIntl) {
-  return parentIntl || new MatStepperIntl();
-}
-
-/**
- * @docs-private
- * @deprecated No longer used, will be removed.
- * @breaking-change 21.0.0
- */
-export const MAT_STEPPER_INTL_PROVIDER = {
-  provide: MatStepperIntl,
-  deps: [[new Optional(), new SkipSelf(), MatStepperIntl]],
-  useFactory: MAT_STEPPER_INTL_PROVIDER_FACTORY,
-};

src/material/stepper/stepper-module.ts

@@ -16,7 +16,6 @@ import {MatStepLabel} from './step-label';
 import {MatStep, MatStepper} from './stepper';
 import {MatStepperNext, MatStepperPrevious} from './stepper-button';
 import {MatStepperIcon} from './stepper-icon';
-import {MAT_STEPPER_INTL_PROVIDER} from './stepper-intl';
 import {MatStepContent} from './step-content';
 
 @NgModule({
@@ -46,6 +45,6 @@ import {MatStepContent} from './step-content';
     MatStepperIcon,
     MatStepContent,
   ],
-  providers: [MAT_STEPPER_INTL_PROVIDER, ErrorStateMatcher],
+  providers: [ErrorStateMatcher],
 })
 export class MatStepperModule {}