[m-rev.] for review: Fix unused variable warning about MERC_INT_DIR.

[Zoltan Somogyi]

On 2023-10-17 11:52 +11:00 AEDT, "Peter Wang" <novalazy at gmail.com> wrote:
> scripts/Mmake.vars.in:
>     Move the definition of MERC_INT_DIR to Mmake.vars,
>     before its reference in MERC_INT_DIR_FOR_VPATH.
> 
> scripts/Mmake.rules:
>     Delete definition of MERC_INT_DIR from Mmake.rules.

That's fine.

Zoltan.