Remove old $tester variable and usused imports

tests/Unit/UserTest.php

@@ -2,18 +2,10 @@
 namespace Tests\Unit;
 
 use App\Models\User;
-use Illuminate\Foundation\Testing\DatabaseMigrations;
-use Illuminate\Foundation\Testing\DatabaseTransactions;
-use Illuminate\Foundation\Testing\WithoutMiddleware;
 use Tests\TestCase;
 
 class UserTest extends TestCase
 {
-    /**
-     * @var \UnitTester
-     */
-    protected $tester;
-
     public function testFirstNameSplit()
     {
         $fullname = "Natalia Allanovna Romanova-O'Shostakova";