Re: cleanup of cbrt() handling

Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > This patch cleans up our static cbrt() implementation in float.c.
>
> Looks like an improvement to me.

Yep, however, now that I look at the original code, and code that
shipped in 7.3:

#ifndef HAVE_CBRT
#define cbrt my_cbrt
static double cbrt(double x);

#else
#if !defined(nextstep)
extern double cbrt(double x);
#endif
#endif /* HAVE_CBRT */

There is no my_cbrt() function, meaning anyone who didn't have cbrt
couldn't have even compiled 7.3, so I think we should just remove cbrt,
or mark it as UNUSED.

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