sys-devel/gdb: treeclean

[arkamar]

• It is old version, far behind current state in gentoo
• Versions in gentoo seem to work well
• PYTHON_COMPAT does not contain any supported version in gentoo

[thesamesam]

Sorry, I missed this when I pushed:

commit 07e8f090c6b07aee3c4853c27694d18a198d46d7 Author: Sam James sam@gentoo.org Date: Wed May 31 01:31:20 2023 +0100

sys-devel/gdb: treeclean

::gentoo works fine.

Signed-off-by: Sam James <sam@gentoo.org>