Remove unused class

Signed-off-by: alperozturk <alper_ozturk@proton.me>

app/src/main/java/com/nextcloud/utils/e2e/CertificateValidator.kt

@@ -1,11 +0,0 @@
-/*
- * Nextcloud - Android Client
- *
- * SPDX-FileCopyrightText: 2024 Alper Ozturk <alper.ozturk@nextcloud.com>
-
- * SPDX-License-Identifier: AGPL-3.0-or-later
- */
-
-package com.nextcloud.utils.e2e
-
-class CertificateValidator