refactor(core): remove duplicated WrappedValue class (#37940)

Before this refactoring we had the WrappedValue class in
2 separate places:
- packages/core/src/change_detection/change_detection_util.ts
- packages/core/src/util/WrappedValue.ts

This commit removes the duplicate, leaving the class that has
the deprecation notice.

PR Close #37940

packages/core/src/util/WrappedValue.ts

@@ -1,54 +0,0 @@
-/**
- * @license
- * Copyright Google LLC All Rights Reserved.
- *
- * Use of this source code is governed by an MIT-style license that can be
- * found in the LICENSE file at https://angular.io/license
- */
-
-/**
- * Indicates that the result of a {@link Pipe} transformation has changed even though the
- * reference has not changed.
- *
- * Wrapped values are unwrapped automatically during the change detection, and the unwrapped value
- * is stored.
- *
- * Example:
- *
- * ```
- * if (this._latestValue === this._latestReturnedValue) {
- *    return this._latestReturnedValue;
- *  } else {
- *    this._latestReturnedValue = this._latestValue;
- *    return WrappedValue.wrap(this._latestValue); // this will force update
- *  }
- * ```
- *
- * @publicApi
- */
-export class WrappedValue {
-  /** @deprecated from 5.3, use `unwrap()` instead - will switch to protected */
-  wrapped: any;
-
-  constructor(value: any) {
-    this.wrapped = value;
-  }
-
-  /** Creates a wrapped value. */
-  static wrap(value: any): WrappedValue {
-    return new WrappedValue(value);
-  }
-
-  /**
-   * Returns the underlying value of a wrapped value.
-   * Returns the given `value` when it is not wrapped.
-   **/
-  static unwrap(value: any): any {
-    return WrappedValue.isWrapped(value) ? value.wrapped : value;
-  }
-
-  /** Returns true if `value` is a wrapped value. */
-  static isWrapped(value: any): value is WrappedValue {
-    return value instanceof WrappedValue;
-  }
-}