Remove leftover debug statement in template code.

A normal template action was showing as:

```
TASK: [template src=../templates/developer-rhel6.ks dest=/var/www/mrepo/kickstart/${inventory_hostname}.ks] *** 
DEBUG: data = {{ ../templates/ssh-keys/...pub }}
DEBUG: data = {{ ../templates/ssh-keys/...pub }}
DEBUG: data = {{ ../templates/ssh-keys/....pub }}
```