Revert "Support iterables objects on data_get nested arrays (#37443)"

This reverts commit 32ac02a.

Author: taylorotwell

src/Illuminate/Collections/helpers.php

@@ -58,7 +58,7 @@ function data_get($target, $key, $default = null)
             if ($segment === '*') {
                 if ($target instanceof Collection) {
                     $target = $target->all();
-                } elseif (! is_iterable($target)) {
+                } elseif (! is_array($target)) {
                     return value($default);
                 }
 

tests/Support/SupportHelpersTest.php

@@ -3,11 +3,9 @@
 namespace Illuminate\Tests\Support;
 
 use ArrayAccess;
-use ArrayIterator;
 use Illuminate\Contracts\Support\Htmlable;
 use Illuminate\Support\Env;
 use Illuminate\Support\Optional;
-use IteratorAggregate;
 use LogicException;
 use Mockery as m;
 use PHPUnit\Framework\TestCase;
@@ -89,18 +87,10 @@ public function testDataGetWithNestedArrays()
             ['name' => 'abigail'],
             ['name' => 'dayle'],
         ];
-        $arrayIterable = new SupportTestArrayIterable([
-            ['name' => 'taylor', 'email' => '[email protected]'],
-            ['name' => 'abigail'],
-            ['name' => 'dayle'],
-        ]);
 
         $this->assertEquals(['taylor', 'abigail', 'dayle'], data_get($array, '*.name'));
         $this->assertEquals(['[email protected]', null, null], data_get($array, '*.email', 'irrelevant'));
 
-        $this->assertEquals(['taylor', 'abigail', 'dayle'], data_get($arrayIterable, '*.name'));
-        $this->assertEquals(['[email protected]', null, null], data_get($arrayIterable, '*.email', 'irrelevant'));
-
         $array = [
             'users' => [
                 ['first' => 'taylor', 'last' => 'otwell', 'email' => '[email protected]'],
@@ -802,18 +792,3 @@ public function offsetUnset($offset)
         unset($this->attributes[$offset]);
     }
 }
-
-class SupportTestArrayIterable implements IteratorAggregate
-{
-    protected $items = [];
-
-    public function __construct($items = [])
-    {
-        $this->items = $items;
-    }
-
-    public function getIterator()
-    {
-        return new ArrayIterator($this->items);
-    }
-}