RFC: Removing malloc hooks

[Joseph Myers]

On Thu, 5 Apr 2018, DJ Delorie wrote:

> +#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_24)
> +# define HAVE_MALLOC_HOOKS 1
> +#else
> +# define HAVE_MALLOC_HOOKS 0
> +#endif

I don't see where this 2.24 version comes from (but I also don't see 
anything using this macro).

-- 
Joseph S. Myers
joseph@codesourcery.com