[abort-controller] Remove polyfills for AbortController and AbortSignal (Azure#27921)

### Packages impacted by this PR

`@azure/abort-controller`

### Issues associated with this PR

Fixes Azure#27018

### Describe the problem that is addressed by this PR

As `AbortController` and `AbortSignal` now exist in all supported
runtimes, we do not need to have our own userland implementation of
them.

This PR creates a new major version of the `abort-controller` package
that only has `AbortSignalLike` and `AbortError` and updates core +
test-utils to use the new version.

Author: xirzec

common/config/rush/pnpm-lock.yaml

@@ -1,11 +1,13 @@
 # Release History
 
-## 1.1.1 (Unreleased)
+## 2.0.0 (Unreleased)
 
 ### Features Added
 
 ### Breaking Changes
 
+- Removed our polyfill implementation for `AbortSignal` and `AbortController` as these are now supported across our minimum required runtime environments.
+
 ### Bugs Fixed
 
 ### Other Changes

sdk/core/abort-controller/CHANGELOG.md

@@ -1,7 +1,7 @@
 {
   "name": "@azure/abort-controller",
   "sdk-type": "client",
-  "version": "1.1.1",
+  "version": "2.0.0",
   "description": "Microsoft Azure SDK for JavaScript - Aborter",
   "main": "./dist/index.js",
   "module": "dist-esm/src/index.js",

sdk/core/abort-controller/package.json

@@ -4,33 +4,11 @@
 
 ```ts
 
-// @public
-class AbortController_2 {
-    constructor(parentSignals?: AbortSignalLike[]);
-    constructor(...parentSignals: AbortSignalLike[]);
-    abort(): void;
-    get signal(): AbortSignal_2;
-    static timeout(ms: number): AbortSignal_2;
-}
-export { AbortController_2 as AbortController }
-
 // @public
 export class AbortError extends Error {
     constructor(message?: string);
 }
 
-// @public
-class AbortSignal_2 implements AbortSignalLike {
-    constructor();
-    get aborted(): boolean;
-    addEventListener(_type: "abort", listener: (this: AbortSignalLike, ev: any) => any): void;
-    dispatchEvent(_event: Event): boolean;
-    static get none(): AbortSignal_2;
-    onabort: ((ev?: Event) => any) | null;
-    removeEventListener(_type: "abort", listener: (this: AbortSignalLike, ev: any) => any): void;
-}
-export { AbortSignal_2 as AbortSignal }
-
 // @public
 export interface AbortSignalLike {
     readonly aborted: boolean;

sdk/core/abort-controller/review/abort-controller.api.md

@@ -0,0 +1,27 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT license.
+
+/**
+ * This error is thrown when an asynchronous operation has been aborted.
+ * Check for this error by testing the `name` that the name property of the
+ * error matches `"AbortError"`.
+ *
+ * @example
+ * ```ts
+ * const controller = new AbortController();
+ * controller.abort();
+ * try {
+ *   doAsyncWork(controller.signal)
+ * } catch (e) {
+ *   if (e.name === 'AbortError') {
+ *     // handle abort error here.
+ *   }
+ * }
+ * ```
+ */
+export class AbortError extends Error {
+  constructor(message?: string) {
+    super(message);
+    this.name = "AbortError";
+  }
+}