DELETE endpoint error codes

John / Allan / et al.,
I took a stab at rewriting the entire error code normative text for the DELETE endpoint, based on all of your feedback and suggestions.  Hopefully this reads better now, and is more clear.
Please review and add any additional suggestions that you feel would help improve the readability and understanding of the text. Also, if I did not capture some of your views correctly please call them out so we can fix.
The changes were made in Section 5.7 found here:
https://docs.google.com/document/d/1EsiWY7TGqt9yH6QUXv4c-opXSr3wR0TDMt8Q0yJjpoo/edit#heading=h.kh75cbpovqfk
I am also attaching a screen shot of the section that contains all of the new text. Once we can get consensus on this language, I can replicate it across all of the endpoints.
Thanks
Bret
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