diff --git a/src/Symfony/Component/OptionsResolver/CHANGELOG.md b/src/Symfony/Component/OptionsResolver/CHANGELOG.md
index 84c45946a9b72..791a402faaf3a 100644
--- a/src/Symfony/Component/OptionsResolver/CHANGELOG.md
+++ b/src/Symfony/Component/OptionsResolver/CHANGELOG.md
@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+6.0
+---
+
+ * Remove `OptionsResolverIntrospector::getDeprecationMessage()`
+
 5.3
 ---
 
diff --git a/src/Symfony/Component/OptionsResolver/Debug/OptionsResolverIntrospector.php b/src/Symfony/Component/OptionsResolver/Debug/OptionsResolverIntrospector.php
index 95909f32e48e6..7374519dd336b 100644
--- a/src/Symfony/Component/OptionsResolver/Debug/OptionsResolverIntrospector.php
+++ b/src/Symfony/Component/OptionsResolver/Debug/OptionsResolverIntrospector.php
@@ -96,20 +96,6 @@ public function getNormalizers(string $option): array
         return ($this->get)('normalizers', $option, sprintf('No normalizer was set for the "%s" option.', $option));
     }
 
-    /**
-     * @return string|\Closure
-     *
-     * @throws NoConfigurationException on no configured deprecation
-     *
-     * @deprecated since Symfony 5.1, use "getDeprecation()" instead.
-     */
-    public function getDeprecationMessage(string $option)
-    {
-        trigger_deprecation('symfony/options-resolver', '5.1', 'The "%s()" method is deprecated, use "getDeprecation()" instead.', __METHOD__);
-
-        return $this->getDeprecation($option)['message'];
-    }
-
     /**
      * @throws NoConfigurationException on no configured deprecation
      */
diff --git a/src/Symfony/Component/OptionsResolver/OptionsResolver.php b/src/Symfony/Component/OptionsResolver/OptionsResolver.php
index a8ae153f46ee5..60787289041be 100644
--- a/src/Symfony/Component/OptionsResolver/OptionsResolver.php
+++ b/src/Symfony/Component/OptionsResolver/OptionsResolver.php
@@ -449,7 +449,7 @@ public function isNested(string $option): bool
      * @param string          $version The version of the package that introduced the deprecation
      * @param string|\Closure $message The deprecation message to use
      */
-    public function setDeprecated(string $option/*, string $package, string $version, $message = 'The option "%name%" is deprecated.' */): self
+    public function setDeprecated(string $option, string $package, string $version, $message = 'The option "%name%" is deprecated.'): self
     {
         if ($this->locked) {
             throw new AccessException('Options cannot be deprecated from a lazy option or normalizer.');
@@ -459,19 +459,6 @@ public function setDeprecated(string $option/*, string $package, string $version
             throw new UndefinedOptionsException(sprintf('The option "%s" does not exist, defined options are: "%s".', $this->formatOptions([$option]), implode('", "', array_keys($this->defined))));
         }
 
-        $args = \func_get_args();
-
-        if (\func_num_args() < 3) {
-            trigger_deprecation('symfony/options-resolver', '5.1', 'The signature of method "%s()" requires 2 new arguments: "string $package, string $version", not defining them is deprecated.', __METHOD__);
-
-            $message = $args[1] ?? 'The option "%name%" is deprecated.';
-            $package = $version = '';
-        } else {
-            $package = $args[1];
-            $version = $args[2];
-            $message = $args[3] ?? 'The option "%name%" is deprecated.';
-        }
-
         if (!\is_string($message) && !$message instanceof \Closure) {
             throw new InvalidArgumentException(sprintf('Invalid type for deprecation message argument, expected string or \Closure, but got "%s".', get_debug_type($message)));
         }
diff --git a/src/Symfony/Component/OptionsResolver/Tests/Debug/OptionsResolverIntrospectorTest.php b/src/Symfony/Component/OptionsResolver/Tests/Debug/OptionsResolverIntrospectorTest.php
index 17d38bf9ad231..404d29d0a38bc 100644
--- a/src/Symfony/Component/OptionsResolver/Tests/Debug/OptionsResolverIntrospectorTest.php
+++ b/src/Symfony/Component/OptionsResolver/Tests/Debug/OptionsResolverIntrospectorTest.php
@@ -215,32 +215,6 @@ public function testGetNormalizersThrowsOnNotDefinedOption()
         $debug->getNormalizers('foo');
     }
 
-    /**
-     * @group legacy
-     */
-    public function testGetDeprecationMessage()
-    {
-        $resolver = new OptionsResolver();
-        $resolver->setDefined('foo');
-        $resolver->setDeprecated('foo', 'The option "foo" is deprecated.');
-
-        $debug = new OptionsResolverIntrospector($resolver);
-        $this->assertSame('The option "foo" is deprecated.', $debug->getDeprecationMessage('foo'));
-    }
-
-    /**
-     * @group legacy
-     */
-    public function testGetClosureDeprecationMessage()
-    {
-        $resolver = new OptionsResolver();
-        $resolver->setDefined('foo');
-        $resolver->setDeprecated('foo', $closure = function (Options $options, $value) {});
-
-        $debug = new OptionsResolverIntrospector($resolver);
-        $this->assertSame($closure, $debug->getDeprecationMessage('foo'));
-    }
-
     public function testGetDeprecation()
     {
         $resolver = new OptionsResolver();
diff --git a/src/Symfony/Component/OptionsResolver/Tests/OptionsResolverTest.php b/src/Symfony/Component/OptionsResolver/Tests/OptionsResolverTest.php
index 3c36225e183a6..596f19a80dcab 100644
--- a/src/Symfony/Component/OptionsResolver/Tests/OptionsResolverTest.php
+++ b/src/Symfony/Component/OptionsResolver/Tests/OptionsResolverTest.php
@@ -452,7 +452,7 @@ public function testFailIfSetDeprecatedFromLazyOption()
         $this->resolver
             ->setDefault('bar', 'baz')
             ->setDefault('foo', function (Options $options) {
-                $options->setDeprecated('bar');
+                $options->setDeprecated('bar', 'vendor/package', '1.1');
             })
             ->resolve()
         ;
@@ -461,7 +461,7 @@ public function testFailIfSetDeprecatedFromLazyOption()
     public function testSetDeprecatedFailsIfUnknownOption()
     {
         $this->expectException(UndefinedOptionsException::class);
-        $this->resolver->setDeprecated('foo');
+        $this->resolver->setDeprecated('foo', 'vendor/package', '1.1');
     }
 
     public function testSetDeprecatedFailsIfInvalidDeprecationMessageType()
@@ -2492,19 +2492,6 @@ public function testInfoOnInvalidValue()
         $this->resolver->resolve(['expires' => new \DateTime('-1 hour')]);
     }
 
-    /**
-     * @group legacy
-     */
-    public function testSetDeprecatedWithoutPackageAndVersion()
-    {
-        $this->expectDeprecation('Since symfony/options-resolver 5.1: The signature of method "Symfony\Component\OptionsResolver\OptionsResolver::setDeprecated()" requires 2 new arguments: "string $package, string $version", not defining them is deprecated.');
-
-        $this->resolver
-            ->setDefined('foo')
-            ->setDeprecated('foo')
-        ;
-    }
-
     public function testInvalidValueForPrototypeDefinition()
     {
         $this->expectException(InvalidOptionsException::class);