remove gtar dependency

roles/nextcloud/tasks/dependencies.yml

@@ -1,17 +1,4 @@
 ---
-- name: Install required system packages
-  apt:
-    name:
-      - python3-pip
-    state: latest
-    update_cache: true
-    cache_valid_time: 3600
-
-- name: Install required python packages
-  pip:
-    name: gtar  # needed for latest nextcloud tar.bz2 archiv
-    state: latest
-
 - name: Enable APCu
   lineinfile:
     path: /etc/php/{{ php_version }}/cli/conf.d/20-apcu.ini