Drop Iu*S support and related dependencies

There's optional libiu for Iu*S support but it's just a leftover from
pre repo-split times:
* it's not used by any code
* it's not checked by gerrit verification in osmo-ci
* it's disabled by default
* it's not supported in .deb packages

Instead of dragging old code in unknown stage of bit-rotting, let's just
drop it completely.

Change-Id: Id5678a74504b4456aba0438ccc34731770801128
8 files changed
tree: fcf357c48df38a9abc7ba2add85e9ea298027eaa
  1. contrib/
  2. debian/
  3. manuals/
  4. openbsc/
  5. .gitignore
  6. .gitreview
  7. .mailmap