diff --git a/src/Internal/functions.php b/src/Internal/functions.php
index fc945b4..6776ff8 100644
--- a/src/Internal/functions.php
+++ b/src/Internal/functions.php
@@ -30,27 +30,6 @@ function formatStacktrace(array $trace): string
     }, $trace, \array_keys($trace)));
 }
 
-/**
- * Creates a `TypeError` with a standardized error message.
- *
- * @param string[] $expected Expected types.
- * @param mixed    $given Given value.
- *
- * @internal
- */
-function createTypeError(array $expected, mixed $given): \TypeError
-{
-    $givenType = \is_object($given) ? \sprintf("instance of %s", \get_class($given)) : \gettype($given);
-
-    if (\count($expected) === 1) {
-        $expectedType = "Expected the following type: " . \array_pop($expected);
-    } else {
-        $expectedType = "Expected one of the following types: " . \implode(", ", $expected);
-    }
-
-    return new \TypeError("{$expectedType}; {$givenType} given");
-}
-
 /**
  * @return bool True if AMP_DEBUG is set to a truthy value.
  */