Stop managing apt sources on ubuntu

Given that we are just installing CI tools, we can leave this step up
to the operator to manage them setup.

Change-Id: I965189e0b559b8a4a79663105eaf48e83cc820f1
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

playbooks/bootstrap.yaml

@@ -23,16 +23,6 @@
     - openstack.virtualenv
 
   pre_tasks:
-    - name: Configure APT data sources.
-      become: yes
-      template:
-        dest: /etc/apt/sources.list
-        group: root
-        mode: 0644
-        owner: root
-        src: bootstrap/etc/apt/sources.list.j2
-      when: ansible_os_family == 'Debian'
-
     - name: Update apt cache.
       become: yes
       apt:

playbooks/templates/bootstrap/etc/apt/sources.list.j2

@@ -1,6 +0,0 @@
-# This file is generated by Ansible
-#  DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
-#
-deb http://archive.ubuntu.com/ubuntu {{ ansible_distribution_release }} main universe
-deb http://archive.ubuntu.com/ubuntu {{ ansible_distribution_release }}-updates main universe
-deb http://archive.ubuntu.com/ubuntu {{ ansible_distribution_release }}-security main universe