Drupal 10 Compatibility, Fix Issue #3164275.

composer.json

@@ -2,9 +2,6 @@
     "name": "drupal/update_notifications_disable",
     "type": "drupal-module",
     "license": "GPL-2.0-or-later",
-    "require": {
-        "drupal/core": "^8 || ^9"
-    },
     "extra": {
         "branch-alias": {
             "dev-8.x-1.x": "1.x-dev"

update_notifications_disable.info.yml

 name: 'Update Notification Disable'
 type: module
 description: "Turns off core's update notification and removes warning about the Update status module not being enabled."
-core: 8.x
-core_version_requirement: ^8 || ^9
+core_version_requirement: '>=8.9 <11.0.0-stable'
 package: Other
 hidden: true

update_notifications_disable.install

+<?php
+
+/**
+ * Implements hook_install().
+ *
+ * Ensure that the Available releases array is empty so it never checks them.
+ */
+function update_notifications_disable_install($is_syncing) {
+  \Drupal::keyValueExpirable('update_available_releases')->deleteAll();
+  \Drupal::keyValueExpirable('update_available_releases')->setMultiple([]);
+}
\ No newline at end of file

update_notifications_disable.module

@@ -9,5 +9,17 @@
  * Implements hook_update_projects_alter().
  */
 function update_notifications_disable_update_projects_alter(&$projects) {
+  \Drupal::keyValueExpirable('update_available_releases')->deleteAll();
+  \Drupal::keyValueExpirable('update_available_releases')->setMultiple([]);
   $projects = [];
 }
+
+/**
+ * Implements hook_cron().
+ *
+ * Make sure that when cron runs, available data is not fetched.
+ */
+function update_notifications_disable_cron() {
+  \Drupal::keyValueExpirable('update_available_releases')->deleteAll();
+  \Drupal::keyValueExpirable('update_available_releases')->setMultiple([]);
+}