Remove duplicate include in user_guide

Looks like two commits merged close to each other and an '-include'
got left along with its replacement '-include_tasks'

docs/docsite/rst/user_guide/playbooks_loops.rst

@@ -262,7 +262,6 @@ Ansible by default sets the loop variable ``item`` for each loop, which causes t
 As of Ansible 2.1, the ``loop_control`` option can be used to specify the name of the variable to be used for the loop::
 
     # main.yml
-    - include: inner.yml
     - include_tasks: inner.yml
       loop:
         - 1