refactor(common): drop deprecated selector from the NgOptimizedImage directive (#47798)

This commit updates the NgOptimizedImage directive to:
- drop a deprecated selector (the `rawSrc` one)
- drop corresponding input getter

The `rawSrc` was replaced by the `ngSrc` one during the developer preview phase.

PR Close #47798

packages/common/src/directives/ng_optimized_image/ng_optimized_image.ts

@@ -207,7 +207,7 @@ export const IMAGE_CONFIG = new InjectionToken<ImageConfig>(
  */
 @Directive({
   standalone: true,
-  selector: 'img[ngSrc],img[rawSrc]',
+  selector: 'img[ngSrc]',
   host: {
     '[style.position]': 'fill ? "absolute" : null',
     '[style.width]': 'fill ? "100%" : null',
@@ -235,29 +235,6 @@ export class NgOptimizedImage implements OnInit, OnChanges, OnDestroy {
    */
   private _renderedSrc: string|null = null;
 
-  /**
-   * Previously, the `rawSrc` attribute was used to activate the directive.
-   * The attribute was renamed to `ngSrc` and this input just produces an error,
-   * suggesting to switch to `ngSrc` instead.
-   *
-   * This error should be removed in v15.
-   *
-   * @nodoc
-   * @deprecated Use `ngSrc` instead.
-   */
-  @Input()
-  set rawSrc(value: string) {
-    if (ngDevMode) {
-      throw new RuntimeError(
-          RuntimeErrorCode.INVALID_INPUT,
-          `${imgDirectiveDetails(value, false)} the \`rawSrc\` attribute was used ` +
-              `to activate the directive. Newer version of the directive uses the \`ngSrc\` ` +
-              `attribute instead. Please replace \`rawSrc\` with \`ngSrc\` and ` +
-              `\`rawSrcset\` with \`ngSrcset\` attributes in the template to ` +
-              `enable image optimizations.`);
-    }
-  }
-
   /**
    * Name of the source image.
    * Image name will be processed by the image loader and the final URL will be applied as the `src`