feat: remove ExampleTest.php file

This commit deletes the ExampleTest.php file from the tests/Feature directory, which contained a basic test for the application.

tests/Feature/ExampleTest.php

-<?php
-
-namespace Tests\Feature;
-
-use Illuminate\Foundation\Testing\RefreshDatabase;
-use Tests\TestCase;
-
-class ExampleTest extends TestCase
-{
-    use RefreshDatabase;
-
-    /**
-     * A basic test example.
-     */
-    public function test_the_application_returns_a_successful_response(): void
-    {
-        $response = $this->get('/');
-
-        $response->assertStatus(200);
-    }
-}