oonf-*: remove oonf packages such as init scripts, proxy, radio, olsrd2

These packages have not been compiling for some time due to the
transition to GCC14 (issue: OLSR/OONF#71).
This has been reported to the upstream repositories, but it appears
that development has stalled.

Additionally, the project's website and documentation have been
non-functional since 2024. Reference:
OLSR/OONF#54

Another issue is the transition to CMake 4.x, which causes the
packages to fail with the following error:

CMake Error at CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 3.5 has been removed from CMake.

  Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
  to tell CMake that the project requires at least <min> but has been updated
  to work with policies introduced by <max> or earlier.

  Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.

Signed-off-by: Josef Schlehofer <[email protected]>

Author: BKPepe