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?