diff --git a/spec/XmlTv/XmlTvSpec.php b/spec/XmlTv/XmlTvSpec.php
index 1c155fc..e16050d 100644
--- a/spec/XmlTv/XmlTvSpec.php
+++ b/spec/XmlTv/XmlTvSpec.php
@@ -111,13 +111,6 @@ function it_throws_if_an_element_cannot_be_serialized()
     {
         $this->shouldThrow(\TypeError::class)->duringGenerate(new UnserializableChild(), false);
     }
-
-    function it_provides_support_for_legacy_code()
-    {
-        $xml = '<?xml version="1.0"?>' . PHP_EOL . '<tv/>' . PHP_EOL;
-
-        $this->generate(new LegacyMethods(), false)->shouldReturn($xml);
-    }
 }
 
 class InvalidTv extends Tv
@@ -137,12 +130,3 @@ public function xmlSerialize(): XmlElement
             ->withChild(new \stdClass());
     }
 }
-
-class LegacyMethods extends Tv
-{
-    public function xmlSerialize(): XmlElement
-    {
-        return (new XmlElement('tv'))
-            ->withOptionalChild(new XmlElement('foo'));
-    }
-}
diff --git a/src/XmlElement.php b/src/XmlElement.php
index 7fcf3f8..4b1d947 100644
--- a/src/XmlElement.php
+++ b/src/XmlElement.php
@@ -100,18 +100,6 @@ public function withChild(?XmlSerializable $child): XmlElement
         return $this;
     }
 
-    /**
-     * Add an optional child.
-     *
-     * @param ?XmlSerializable $child
-     * @return XmlElement
-     * @deprecated Use `XmlElement::withChild()` instead.
-     */
-    public function withOptionalChild(?XmlSerializable $child): XmlElement
-    {
-        return $this->withChild($child);
-    }
-
     /**
      * Add children.
      *