perf(material/button): Remove unused inject. (#30320)

(cherry picked from commit ff8cffc)

Author: kseamon

src/material/button/BUILD.bazel

@@ -26,7 +26,6 @@ ng_module(
         ":icon-button_scss",
     ] + glob(["**/*.html"]),
     deps = [
-        "//src/cdk/platform",
         "//src/material/core",
     ],
 )

src/material/button/button-base.ts

@@ -7,7 +7,6 @@
  */
 
 import {FocusMonitor, FocusOrigin} from '@angular/cdk/a11y';
-import {Platform} from '@angular/cdk/platform';
 import {
   AfterViewInit,
   ANIMATION_MODULE_TYPE,
@@ -91,7 +90,6 @@ const HOST_SELECTOR_MDC_CLASS_PAIR: {attribute: string; mdcClasses: string[]}[]
 @Directive()
 export class MatButtonBase implements AfterViewInit, OnDestroy {
   _elementRef = inject(ElementRef);
-  _platform = inject(Platform);
   _ngZone = inject(NgZone);
   _animationMode = inject(ANIMATION_MODULE_TYPE, {optional: true});
 

tools/public_api_guard/material/button.md

@@ -14,7 +14,6 @@ import { MatRippleLoader } from '@angular/material/core';
 import { NgZone } from '@angular/core';
 import { OnDestroy } from '@angular/core';
 import { OnInit } from '@angular/core';
-import { Platform } from '@angular/cdk/platform';
 import { ThemePalette } from '@angular/material/core';
 
 // @public