util: move util.isString to eol

PR-URL: #52744
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz.nizipli@sentry.io>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Ulises Gascón <ulisesgascongonzalez@gmail.com>
Reviewed-By: Paolo Insogna <paolo@cowtech.it>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: marco-ippolito

Diff for: doc/api/deprecations.md

@@ -1277,6 +1277,9 @@ The [`util.isRegExp()`][] API is deprecated. Please use
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/52744
+    description: End-of-Life deprecation.
   - version: v22.0.0
     pr-url: https://github.com/nodejs/node/pull/50488
     description: Runtime deprecation.
@@ -1292,9 +1295,9 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Runtime
+Type: End-of-Life
 
-The [`util.isString()`][] API is deprecated. Please use
+The `util.isString()` API has been removed. Please use
 `typeof arg === 'string'` instead.
 
 ### DEP0057: `util.isSymbol()`
@@ -3796,7 +3799,6 @@ is deprecated to better align with recommendations per [NIST SP 800-38D][].
 [`util.isObject()`]: util.md#utilisobjectobject
 [`util.isPrimitive()`]: util.md#utilisprimitiveobject
 [`util.isRegExp()`]: util.md#utilisregexpobject
-[`util.isString()`]: util.md#utilisstringobject
 [`util.isSymbol()`]: util.md#utilissymbolobject
 [`util.isUndefined()`]: util.md#utilisundefinedobject
 [`util.log()`]: util.md#utillogstring

Diff for: doc/api/util.md

@@ -3140,33 +3140,6 @@ util.isRegExp({});
 // Returns: false
 ```
 
-### `util.isString(object)`
-
-<!-- YAML
-added: v0.11.5
-deprecated: v4.0.0
--->
-
-> Stability: 0 - Deprecated: Use `typeof value === 'string'` instead.
-
-* `object` {any}
-* Returns: {boolean}
-
-Returns `true` if the given `object` is a `string`. Otherwise, returns `false`.
-
-```js
-const util = require('node:util');
-
-util.isString('');
-// Returns: true
-util.isString('foo');
-// Returns: true
-util.isString(String('foo'));
-// Returns: true
-util.isString(5);
-// Returns: false
-```
-
 ### `util.isSymbol(object)`
 
 <!-- YAML

Diff for: lib/util.js

@@ -90,14 +90,6 @@ function lazyAbortController() {
 
 let internalDeepEqual;
 
-/**
- * @param {any} arg
- * @returns {arg is string}
- */
-function isString(arg) {
-  return typeof arg === 'string';
-}
-
 /**
  * @deprecated since v4.0.0
  * @param {any} arg
@@ -389,9 +381,6 @@ module.exports = {
     }
     return internalDeepEqual(a, b);
   },
-  isString: deprecate(isString,
-                      'The `util.isString` API is deprecated.  Please use `typeof arg === "string"` instead.',
-                      'DEP0056'),
   isSymbol: deprecate(isSymbol,
                       'The `util.isSymbol` API is deprecated.  Please use `arg === "symbol"` instead.',
                       'DEP0057'),

Diff for: test/parallel/test-util.js

@@ -103,10 +103,6 @@ assert.strictEqual(util.isUndefined(), true);
 assert.strictEqual(util.isUndefined(null), false);
 assert.strictEqual(util.isUndefined('string'), false);
 
-assert.strictEqual(util.isString('string'), true);
-assert.strictEqual(util.isString(), false);
-assert.strictEqual(util.isString(42), false);
-
 assert.strictEqual(util.isSymbol(Symbol()), true);
 assert.strictEqual(util.isSymbol(), false);
 assert.strictEqual(util.isSymbol('string'), false);