salt.minion: no longer manage grains

Grains have only been managed to track roles, however those have since
been moved to the Role API. Hence the managed /etc/salt/grains file can
safely be removed from management.
Existing installations will be cleaned up by me.

Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>

salt/profile/salt/files/etc/salt/grains.j2

@@ -1,9 +0,0 @@
-{%- set header = salt['pillar.get']('managed_header_pound') -%}
-{%- set roles = salt['pillar.get']('netbox:config_context:roles', []) -%}
-{{ header }}
-{%- if roles is defined and roles %}
-roles:
-  {%- for role in roles %}
-  - {{ role }}
-  {%- endfor %}
-{% endif %}

salt/profile/salt/grains.sls

@@ -1,12 +0,0 @@
-salt_grains_file:
-  file.managed:
-    - user: root
-    - mode: '0644'
-    - template: jinja
-    - names:
-      - /etc/salt/grains:
-        - source: salt:///{{ slspath }}/files/etc/salt/grains.j2
-    - require_in:
-      - service: salt-minion
-    - watch_in:
-      - service: salt-minion

salt/profile/salt/minion.sls

@@ -18,5 +18,4 @@
       - service: salt-minion
 
 include:
-  - .grains
   - salt.minion