Remove return types that confuse our types patching script

Signed-off-by: Alexander M. Turek <[email protected]>

Author: derrabus

Util/OrderedHashMapIterator.php

@@ -105,7 +105,7 @@ public function __destruct()
     /**
      * {@inheritdoc}
      *
-     * @return TValue|null
+     * @return mixed
      */
     #[\ReturnTypeWillChange]
     public function current()
@@ -132,7 +132,7 @@ public function next(): void
     /**
      * {@inheritdoc}
      *
-     * @return TKey|null
+     * @return mixed
      */
     #[\ReturnTypeWillChange]
     public function key()