events: graduate Event, EventTarget, AbortController

Graduate these from experimental status

Signed-off-by: James M Snell <jasnell@gmail.com>

PR-URL: #35949
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

doc/api/cli.md

@@ -210,7 +210,7 @@ changes:
     description: --experimental-abortcontroller is no longer required.
 -->
 
-Experimental `AbortController` and `AbortSignal` support is enabled by default.
+`AbortController` and `AbortSignal` support is enabled by default.
 Use of this command-line flag is no longer required.
 
 ### `--experimental-import-meta-resolve`

doc/api/events.md

@@ -1137,14 +1137,15 @@ setMaxListeners(5, target, emitter);
 <!-- YAML
 added: v14.5.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/35949
+    description: No longer experimental.
   - version: v15.0.0
     pr-url: https://github.com/nodejs/node/pull/35496
     description:
       The `EventTarget` and `Event` classes are now available as globals.
 -->
 
-> Stability: 1 - Experimental
-
 The `EventTarget` and `Event` objects are a Node.js-specific implementation
 of the [`EventTarget` Web API][] that are exposed by some Node.js core APIs.
 Neither the `EventTarget` nor `Event` classes are available for end

doc/api/globals.md

@@ -20,10 +20,12 @@ accessible.
 ## Class: `AbortController`
 <!--YAML
 added: v15.0.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/35949
+    description: No longer experimental.
 -->
 
-> Stability: 1 - Experimental
-
 <!-- type=global -->
 
 A utility class used to signal cancelation in selected `Promise`-based APIs.
@@ -172,24 +174,28 @@ Used to print to stdout and stderr. See the [`console`][] section.
 ## `Event`
 <!-- YAML
 added: v15.0.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/35949
+    description: No longer experimental.
 -->
 
 <!-- type=global -->
 
-> Stability: 1 - Experimental
-
 A browser-compatible implementation of the `Event` class. See
 [`EventTarget` and `Event` API][] for more details.
 
 ## `EventTarget`
 <!-- YAML
 added: v15.0.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/35949
+    description: No longer experimental.
 -->
 
 <!-- type=global -->
 
-> Stability: 1 - Experimental
-
 A browser-compatible implementation of the `EventTarget` class. See
 [`EventTarget` and `Event` API][] for more details.
 

lib/internal/abort_controller.js

@@ -21,7 +21,6 @@ const {
 } = require('internal/event_target');
 const {
   customInspectSymbol,
-  emitExperimentalWarning
 } = require('internal/util');
 const { inspect } = require('internal/util/inspect');
 
@@ -89,7 +88,6 @@ const kSignal = Symbol('signal');
 class AbortController {
   constructor() {
     this[kSignal] = createAbortSignal();
-    emitExperimentalWarning('AbortController');
   }
 
   get signal() { return this[kSignal]; }