diff --git a/src/LiveComponent/.gitignore b/src/LiveComponent/.gitignore
index 1784dd6561c..6c06c7ffa62 100644
--- a/src/LiveComponent/.gitignore
+++ b/src/LiveComponent/.gitignore
@@ -3,5 +3,4 @@
 /composer.lock
 /phpunit.xml
 /.phpunit.result.cache
-
 /var
diff --git a/src/LiveComponent/src/Attribute/AsLiveComponent.php b/src/LiveComponent/src/Attribute/AsLiveComponent.php
index 497eed31f8f..570ad0c9264 100644
--- a/src/LiveComponent/src/Attribute/AsLiveComponent.php
+++ b/src/LiveComponent/src/Attribute/AsLiveComponent.php
@@ -49,28 +49,7 @@ public function __construct(
         string|bool $route = 'ux_live_component',
         string $method = 'post',
         int|string $urlReferenceType = UrlGeneratorInterface::ABSOLUTE_PATH,
-        public bool|int $csrf = true, // @deprecated
     ) {
-        if (8 < \func_num_args() || \is_bool($route)) {
-            trigger_deprecation('symfony/ux-live-component', '2.21', 'Argument "$csrf" of "#[%s]" has no effect anymore and is deprecated.', static::class);
-        }
-        if (\is_bool($route)) {
-            $this->csrf = $route;
-            $route = $method;
-            $method = $urlReferenceType;
-            $urlReferenceType = $csrf;
-
-            switch (\func_num_args()) {
-                case 6: $route = 'ux_live_component';
-                    // no break
-                case 7: $method = 'post';
-                    // no break
-                case 8: $urlReferenceType = UrlGeneratorInterface::ABSOLUTE_PATH;
-                    // no break
-                default:
-            }
-        }
-
         parent::__construct($name, $template, $exposePublicProps, $attributesVar);
 
         $this->defaultAction = $defaultAction;
@@ -78,7 +57,7 @@ public function __construct(
         $this->method = strtolower($method);
         $this->urlReferenceType = $urlReferenceType;
 
-        if (!\in_array($method, ['get', 'post'])) {
+        if (!\in_array($this->method, ['get', 'post'])) {
             throw new \UnexpectedValueException('$method must be either \'get\' or \'post\'.');
         }
     }
@@ -91,7 +70,6 @@ public function serviceConfig(): array
         return array_merge(parent::serviceConfig(), [
             'default_action' => $this->defaultAction,
             'live' => true,
-            'csrf' => $this->csrf,
             'route' => $this->route,
             'method' => $this->method,
             'url_reference_type' => $this->urlReferenceType,
diff --git a/src/LiveComponent/src/EventListener/DeferLiveComponentSubscriber.php b/src/LiveComponent/src/EventListener/DeferLiveComponentSubscriber.php
index e7348b1826d..b051926fab3 100644
--- a/src/LiveComponent/src/EventListener/DeferLiveComponentSubscriber.php
+++ b/src/LiveComponent/src/EventListener/DeferLiveComponentSubscriber.php
@@ -34,14 +34,6 @@ public function onPostMount(PostMountEvent $event): void
             return;
         }
 
-        if (\array_key_exists('defer', $data)) {
-            trigger_deprecation('symfony/ux-live-component', '2.17', 'The "defer" attribute is deprecated and will be removed in 3.0. Use the "loading" attribute instead set to the value "defer".');
-            if ($data['defer']) {
-                $event->addExtraMetadata('loading', 'defer');
-            }
-            unset($data['defer']);
-        }
-
         if (\array_key_exists('loading', $data)) {
             // Ignored values: false / null / ''
             if ($loading = $data['loading']) {
diff --git a/src/LiveComponent/tests/Unit/EventListener/DeferLiveComponentSubscriberTest.php b/src/LiveComponent/tests/Unit/EventListener/DeferLiveComponentSubscriberTest.php
index 5737c03a07f..741de46c486 100644
--- a/src/LiveComponent/tests/Unit/EventListener/DeferLiveComponentSubscriberTest.php
+++ b/src/LiveComponent/tests/Unit/EventListener/DeferLiveComponentSubscriberTest.php
@@ -49,37 +49,6 @@ public function testLoadingAttributeIsNotExtractedWhenComponentIsNotLive()
         $this->assertArrayHasKey('loading', $event->getData());
     }
 
-    /**
-     * @group legacy
-     */
-    public function testLoadingAttributeOverrideDeferAttribute()
-    {
-        $subscriber = new DeferLiveComponentSubscriber();
-        $event = $this->createPostMountEvent(['loading' => 'lazy', 'defer' => true]);
-
-        $this->expectDeprecation('Since symfony/ux-live-component 2.17: The "defer" attribute is deprecated and will be removed in 3.0. Use the "loading" attribute instead set to the value "defer".');
-
-        $subscriber->onPostMount($event);
-
-        $this->assertArrayHasKey('loading', $event->getExtraMetadata());
-        $this->assertSame('lazy', $event->getExtraMetadata()['loading']);
-    }
-
-    /**
-     * @group legacy
-     */
-    public function testDeferAttributeTriggerDeprecation()
-    {
-        $subscriber = new DeferLiveComponentSubscriber();
-        $event = $this->createPostMountEvent([
-            'defer' => true,
-        ]);
-
-        $this->expectDeprecation('Since symfony/ux-live-component 2.17: The "defer" attribute is deprecated and will be removed in 3.0. Use the "loading" attribute instead set to the value "defer".');
-
-        $subscriber->onPostMount($event);
-    }
-
     public function testLoadingAttributesAreRemoved()
     {
         $subscriber = new DeferLiveComponentSubscriber();