Remove if branching

ansible/archlinux/roles/lxc/tasks/archlinux.yml

@@ -1,3 +0,0 @@
-- name: Install LXC
-  pacman: name=lxc state=present
-  become: yes

ansible/archlinux/roles/lxc/tasks/main.yml

@@ -1,2 +1,3 @@
-- include: archlinux.yml
-  when: ansible_os_family == "Archlinux"
+- name: Install LXC
+  pacman: name=lxc state=present
+  become: yes