Revert "Silly change to make PHPStan happy"

This reverts commit 5b14976345767a6f649f9453e4c90d123977a205.

src/Collection/CollectionTrait.php

@@ -819,7 +819,7 @@ trait CollectionTrait
     {
         $iterator = $this->unwrap();
 
-        if (get_class($iterator) === ArrayIterator::class && $iterator instanceof ArrayIterator) {
+        if (get_class($iterator) === ArrayIterator::class) {
             $iterator = $iterator->getArrayCopy();
         }
 

src/Collection/Iterator/ExtractIterator.php

@@ -88,7 +88,7 @@ class ExtractIterator extends Collection
             $iterator = $iterator->unwrap();
         }
 
-        if (get_class($iterator) !== ArrayIterator::class || !$iterator instanceof ArrayIterator) {
+        if (get_class($iterator) !== ArrayIterator::class) {
             return $this;
         }