RFR 8167227: Simplify the JDK 9 API-specification overview page (docs only)

[mark.reinhold at oracle.com]

2017/6/19 10:41:09 +0200, erik.joelsson at oracle.com:
> Looks good to me.
> 
> The change to the log message is a bit weird. Was this meant as a 
> temporary way for finding the output file?

Good catch -- yes, that was temporary.  I'll remove it.

Thanks,
- Mark