Revert "Support for collections & MorphOne polymorphic pivot table"

[awcodes]

Reverts #523

get_class() breaks if $ids is an array of integers instead of array of media items. Line 25 in helpers.php

if (is_array($ids) && is_related_to_media_through_pivot(get_class(current($ids)), Media::class)) {
    $mediaIds = collect($ids)->map(fn ($model) => $model?->media_id)->toArray();

    return Media::whereIn('id', $mediaIds)->get();
}