perf: Don’t subclass Error; resulting in smaller binary (#14160)

Subclassing errors is problematic since Error returns a
new instance. All of the patching which we do than prevent
proper application of source maps.

PR Close #14160

modules/@angular/facade/src/errors.ts

@@ -1,56 +0,0 @@
-/**
- * @license
- * Copyright Google Inc. 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
- */
-
-/**
- * Convenience to throw an Error with 'unimplemented' as the message.
- */
-export function unimplemented(): any {
-  throw new Error('unimplemented');
-}
-
-/**
- * @stable
- */
-export class BaseError extends Error {
-  /** @internal **/
-  _nativeError: Error;
-
-  constructor(message: string) {
-    super(message);
-    // Errors don't use current this, instead they create a new instance.
-    // We have to do forward all of our api to the nativeInstance.
-    // TODO(bradfordcsmith): Remove this hack when
-    //     google/closure-compiler/issues/2102 is fixed.
-    const nativeError = new Error(message) as any as Error;
-    this._nativeError = nativeError;
-  }
-
-  get message() { return this._nativeError.message; }
-  set message(message) { this._nativeError.message = message; }
-  get name() { return this._nativeError.name; }
-  get stack() { return (this._nativeError as any).stack; }
-  set stack(value) { (this._nativeError as any).stack = value; }
-  toString() { return this._nativeError.toString(); }
-}
-
-/**
- * @stable
- */
-export class WrappedError extends BaseError {
-  originalError: any;
-
-  constructor(message: string, error: any) {
-    super(`${message} caused by: ${error instanceof Error ? error.message: error }`);
-    this.originalError = error;
-  }
-
-  get stack() {
-    return ((this.originalError instanceof Error ? this.originalError : this._nativeError) as any)
-        .stack;
-  }
-}