[meta] Remove nested_playbooks playbook

ansible/nested_playbooks.yml

@@ -1,25 +0,0 @@
----
-# it is possible to have top level playbook files import other playbook
-# files.  For example, a playbook called could include three
-# different playbooks, such as webservers, workers, dbservers, etc.
-#
-# Running the site playbook would run all playbooks, while individual
-# playbooks could still be run directly.  This is somewhat like
-# the tag feature and can be used in conjunction for very fine grained
-# control over what you want to target when running ansible.
-
-- name: this is a play at the top level of a file
-  hosts: all
-  tasks:
-  - name: say hi
-    tags: foo
-    shell: echo "hi..."
-
-# and this is how we include another playbook, be careful and
-# don't recurse infinitely or anything.  Note you can't use
-# any variables in the include path here.
-
-- include: intro_example.yml
-
-# and if we wanted, we can continue with more includes here,
-# or more plays inline in this file