[GRASS-git] [OSGeo/grass] 5be073: r.sun: remove unused function 'cube' (#3097)

[Nicklas Larsson]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: 5be073aded82ec05a2d43636e5bef01f7fd05c74
      https://github.com/OSGeo/grass/commit/5be073aded82ec05a2d43636e5bef01f7fd05c74
  Author: Nicklas Larsson <n_larsson at yahoo.com>
  Date:   2023-08-06 (Sun, 06 Aug 2023)

  Changed paths:
    M raster/r.sun/local_proto.h
    M raster/r.sun/main.c
    M raster/r.sun/rsunglobals.h
    M raster/r.sun/rsunlib.c

  Log Message:
  -----------
  r.sun: remove unused function 'cube' (#3097)

For now only comments out relevant parts.
Addresses -Wimplicit-int compiler warnings.
The warning is treated as an error by Clang 16+ and the compilation fails.

This is a partial, manual backport of https://github.com/OSGeo/grass/pull/1405,
commit 594c947ce8984f07faf28d7d71e4c902f4532069.