Remove asset clearCaches function (#492)

* Clear asset cache store

* We don't need this any more as is the same as base Asset

* 🍺

Author: ryanmitchell

src/Assets/Asset.php

@@ -3,7 +3,6 @@
 namespace Statamic\Eloquent\Assets;
 
 use Illuminate\Database\Eloquent\Model;
-use Illuminate\Support\Facades\Cache;
 use Statamic\Assets\Asset as FileAsset;
 use Statamic\Contracts\Assets\Asset as AssetContract;
 use Statamic\Data\HasDirtyState;
@@ -207,11 +206,4 @@ public function getCurrentDirtyStateAttributes(): array
             'data' => $this->data()->toArray(),
         ]);
     }
-
-    protected function clearCaches()
-    {
-        $this->meta = null;
-
-        Cache::forget($this->metaCacheKey());
-    }
 }