Remove "validate_only" parameter and use cases.

[funnylookinhat]

The "validate_only" parameter was initially added to greatly simplify the role of the delivery portion of BeansBooks - reducing the need for writing 2x the code to check input. We should consider removing it as it's an unclean implementation and generally indicates a lack of API functionality over a necessary feature.

• What ( if any ) is a better way to handle this?
• Are there any "API Examples" outside of the web front-end that either negate or supersede this?