do not firejail unbound

Arch now uses Unbound's default systemd service file, which includes
hardening that conflicts with Firejail. But theoretically this should
all be good enough so we can just drop Firejail from this role?

Existing users should delete the override.

    # rm -r /etc/systemd/system/unbound.service.d

https://bugs.archlinux.org/task/61163

roles/unbound/meta/main.yml

@@ -1,4 +1,3 @@
 ---
 dependencies:
-  - { role: firejail }
   - { role: systemd }

roles/unbound/tasks/main.yml

@@ -10,29 +10,6 @@
   notify:
     - restart unbound
 
-- name: Create Unbound systemd unit file directory
-  file: path=/etc/systemd/system/unbound.service.d state=directory
-  tags:
-    - firejail
-
-- name: Push Unbound socket unit file
-  copy: src=unbound-service-override.conf dest=/etc/systemd/system/unbound.service.d/override.conf
-  notify:
-    - reload systemd config
-    - restart unbound
-  tags:
-    - firejail
-
-- name: Remove Unbound systemd unit PID file line
-  lineinfile: dest=/usr/lib/systemd/system/unbound.service
-              state=absent
-              line="PIDFile=/run/unbound.pid"
-  notify:
-    - reload systemd config
-    - restart unbound
-  tags:
-    - firejail
-
 - name: Enable and start Unbound
   service: name=unbound.service enabled=yes state=started