Remove out of date tests.

test/playbook-included.yml

----
-- hosts: all
-  connection: local
-  gather_facts: no
-  tasks:
-  - action: debug msg="{{ variable }}"
-
-- hosts: all
-  connection: local
-  vars:
-  - ugly: var
-  gather_facts: no
-  tasks:
-  - action: debug msg="{{ variable }}"

test/playbook-includer.yml

----
-- include: playbook-included.yml variable=foobar
-- include: playbook-included.yml variable=foofoo
-- include: playbook-included.yml variable=foo