zfs: Remove unused role

roles/zfs/defaults/main.yml

@@ -1,2 +0,0 @@
----
-zfs_url: http://download.zfsonlinux.org/epel

roles/zfs/tasks/main.yml

@@ -1,37 +0,0 @@
----
-- name: add zfs repositories
-  package:
-    name: "{{ zfs_url }}/zfs-release.el{{ ansible_distribution_version|replace('.', '_') }}.noarch.rpm"
-    state: installed
-
-- name: disable zfs dkms repository
-  ini_file:
-    dest: /etc/yum.repos.d/zfs.repo
-    section: zfs
-    option: enabled
-    value: "0"
-
-- name: enable zfs kmod repository
-  ini_file:
-    dest: /etc/yum.repos.d/zfs.repo
-    section: zfs-kmod
-    option: enabled
-    value: "1"
-
-- name: install zfs packages
-  package:
-    name: zfs
-    state: installed
-
-- name: enable zfs
-  modprobe:
-    name: zfs
-    state: present
-
-- name: import zpools
-  command:
-    argv:
-      - zpool
-      - import
-      - -a
-    creates: /export