I'm trying to clean-up the assets in a specific folder that aren't being used at all, i.e. aren't related to anything.

I got the list O.K. just using this

    $assets = Asset::find()->volume('artists')->kind('image')->limit(50000)->ids();

    $assetsToDelete = [];

    foreach($assets as $asset) {
        $results = (new Query())
            ->select(['id'])
            ->from(['{{%relations}}'])
            ->where(['targetId' => $asset])
            ->orWhere(['sourceId' => $asset])
            ->all();

        if (!count($results)) {
            $assetsToDelete[]  = $asset;
        }     
    }

    return  $this->asJson($assetsToDelete);

Right now I'm just returning all the ids in an array but I'm hoping to find a command to delete the element AND delete the stored asset on the server

Any ideas?