As discussed in the mailing list thread starting at
<https://lists.freedesktop.org/archives/libreoffice/2023-January/089808.html>
"Plan to remove dead C++ UNO bridge implementations (bridges/source/cpp_uno/*)",
the bridge implementation at bridges/source/cpp_uno/gcc3_aix_powerpc is
apparently dead and should thus be removed. However, that was the only bridge
implementation for AIX, which implies that support for the AIX platform as a
whole is dead and should thus be removed.
Change-Id: I96de3f7f97d4fd770ff78256f0ea435383688be9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/146057
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
