Drop support for QR code generation

module/Core/test-api/Action/QrCodeTest.php

@@ -1,28 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace ShlinkioApiTest\Shlink\Core\Action;
-
-use PHPUnit\Framework\Attributes\Test;
-use Shlinkio\Shlink\TestUtils\ApiTest\ApiTestCase;
-
-/** @deprecated */
-class QrCodeTest extends ApiTestCase
-{
-    #[Test]
-    public function returnsQrCodeEvenIfShortUrlIsNotEnabled(): void
-    {
-        // The QR code successfully resolves at first
-        $response = $this->callShortUrl('custom/qr-code');
-        self::assertEquals(200, $response->getStatusCode());
-
-        // This short URL allow max 2 visits
-        $this->callShortUrl('custom');
-        $this->callShortUrl('custom');
-
-        // After 2 visits, the short URL returns a 404, but the QR code should still work
-        self::assertEquals(404, $this->callShortUrl('custom')->getStatusCode());
-        self::assertEquals(200, $this->callShortUrl('custom/qr-code')->getStatusCode());
-    }
-}