refactor: remove unneccesary implode/explode

I swear to god

Author: Draconizations

app/Http/Controllers/Admin/Data/FeatureController.php

@@ -354,12 +354,6 @@ public function getCreateEditFeatureSubtype(Request $request) {
         $species = $request->input('species');
         $subtype_ids = $request->input('subtype_ids');
 
-        if ($subtype_ids != 'null') {
-            $subtype_ids = explode(',', $subtype_ids);
-        } else {
-            $subtype_ids = [];
-        }
-
         return view('admin.features._create_edit_feature_subtype', [
             'subtypes'    => Subtype::where('species_id', '=', $species)->orderBy('sort', 'DESC')->pluck('name', 'id')->toArray(),
             'subtype_ids' => $subtype_ids,