The patch fixes access to undefined variable

The patches fixes the situation when repo is not defined but
formula tries to get access to source parameter of the repo.

Change-Id: Ifa7b8475bfc2cece6803ab7da7b2d0d5cc12b652
Related-PROD: PROD-17001

linux/system/repo.sls

@@ -150,7 +150,6 @@ linux_repo_{{ name }}_absent:
     - keyid_ppa: {{ repo.keyid_ppa }}
     {%- endif %}
     {%- else %}
-    - name: {{ repo.source }}
     - file: /etc/apt/sources.list.d/{{ name }}.list
     {%- if repo.key_id is defined %}
     - keyid: {{ repo.key_id }}