readline: make Symbol.asyncIterator support stable

PR-URL: #26989
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Masashi Hirano <shisama07@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

doc/api/readline.md

@@ -311,10 +311,14 @@ The `rl.write()` method will write the data to the `readline` `Interface`'s
 
 ### rl\[Symbol.asyncIterator\]()
 <!-- YAML
-added: v10.16.0
+added: v11.4.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/26989
+    description: Symbol.asyncIterator support is no longer experimental.
 -->
 
-> Stability: 1 - Experimental
+> Stability: 2 - Stable
 
 * Returns: {AsyncIterator}
 

lib/readline.js

@@ -32,8 +32,8 @@ const {
   ERR_INVALID_CURSOR_POS,
   ERR_INVALID_OPT_VALUE
 } = require('internal/errors').codes;
+
 const { debug, inherits } = require('util');
-const { emitExperimentalWarning } = require('internal/util');
 const { Buffer } = require('buffer');
 const EventEmitter = require('events');
 const {
@@ -1005,8 +1005,6 @@ Interface.prototype._ttyWrite = function(s, key) {
 };
 
 Interface.prototype[Symbol.asyncIterator] = function() {
-  emitExperimentalWarning('readline Interface [Symbol.asyncIterator]');
-
   if (this[kLineObjectStream] === undefined) {
     if (Readable === undefined) {
       Readable = require('stream').Readable;