"body" keyword is unnecessary

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On Sunday, 19 November 2017 at 21:14:58 UTC, Jonathan M Davis 
wrote:
> It would have been better to explain in the documentation that 
> body was being phased out rather than just removing it right 
> when the changes were made to dmd. It's already caused problems 
> due to folks trying to use do and it not working with the 
> compiler that they're using (e.g. ldc).
>
> https://stackoverflow.com/questions/46860573/do-ldc-and-gdc-support-d-language-contracts
>
> - Jonathan M Davis

Yeah, you're right. I never use GDC/LDC so I didn't consider them.