Revert "Added argument spec validation to template role"

This reverts commit 38da5f6.

Author: richm

README.md

@@ -30,8 +30,6 @@ on the *control node* before using the role.
 
 ## Role Variables
 
-Validation is enforced by `meta/argument_specs.yml`.
-
 A description of all input variables (i.e. variables that are defined in
 `defaults/main.yml`) for the role should go here as these form an API of the
 role.  Each variable should have its own section e.g.