Apply fixes from StyleCI

Author: tabacitu

src/database/migrations/2020_03_31_114745_remove_backpackuser_model.php

@@ -1,8 +1,6 @@
 <?php
 
 use Illuminate\Database\Migrations\Migration;
-use Illuminate\Database\Schema\Blueprint;
-use Illuminate\Support\Facades\Schema;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Log;
 
@@ -31,7 +29,7 @@ public function replaceModels($table_name)
         // if you've ended up with duplicate entries (both for App\User and App\Models\BackpackUser)
         // we can just delete them
         $userEntries = DB::table($table_name)
-            ->where("model_type", "App\User")
+            ->where('model_type', "App\User")
             ->get();
 
         foreach ($userEntries as $entry) {
@@ -44,9 +42,9 @@ public function replaceModels($table_name)
 
         // for the rest of them, we can just replace the BackpackUser model with User
         DB::table($table_name)
-            ->where("model_type", "App\Models\BackpackUser")
+            ->where('model_type', "App\Models\BackpackUser")
             ->update([
-                "model_type" => "App\User"
+                'model_type' => "App\User",
             ]);
     }
 }