revert(@glimmer/destroyable): revert metadata clearing - root cause is elsewhere

Co-authored-by: NullVoxPopuli <199018+NullVoxPopuli@users.noreply.github.com>

Author: Copilot

packages/@glimmer/destroyable/index.ts

@@ -183,12 +183,6 @@ export function destroy(destroyable: Destroyable) {
     });
 
     meta.state = DESTROYED_STATE;
-
-    // Release references so GC can reclaim the destroyed tree
-    meta.parents = null;
-    meta.children = null;
-    meta.eagerDestructors = null;
-    meta.destructors = null;
   });
 }
 

packages/@glimmer/destroyable/test/destroyables-test.ts

@@ -2,7 +2,6 @@ import { DEBUG } from '@glimmer/env';
 import type { GlobalContext } from '@glimmer/global-context';
 import { unwrap } from '@glimmer/debug-util';
 import {
-  _hasDestroyableChildren,
   assertDestroyablesDestroyed,
   associateDestroyableChild,
   destroy,
@@ -385,23 +384,6 @@ module('Destroyables', (hooks) => {
     assert.verifySteps(['child destructor', 'parent destructor'], 'destructors run bottom up');
   });
 
-  test('metadata children reference is cleared after destruction completes', (assert) => {
-    const parent = {};
-    const child = {};
-
-    associateDestroyableChild(parent, child);
-
-    assert.true(_hasDestroyableChildren(parent), 'parent has children before destruction');
-
-    destroy(parent);
-    flush();
-
-    assert.false(
-      _hasDestroyableChildren(parent),
-      'parent metadata clears children reference after destruction, allowing GC to reclaim the tree'
-    );
-  });
-
   if (DEBUG) {
     test('attempting to unregister a destructor that was not registered throws an error', (assert) => {
       assert.throws(() => {