srv6-mobile: Revert "srv6-mobile:"

srv6-mobile: Revert "srv6-mobile:"

This reverts commit 57584d99dd8a8524db90c67c88525d58879d9b8e.

The reasons for reverting:

- the documentation seems "work in progress". Also, 500K of pngs
  should probably go on wiki, rather than in the repo. Please
  make sure that newly added documentation renders correctly
  and sensibly as part of the review/commit process.

- runner.py seems to contain unit tests, so it should
  be rewritten in a manner that allows the testing from within
  CI (including an unprivileged docker container)

- the above items, especially the testing one, warrant more
  work, and at a RC1 milestone time it is probably not
  a good idea to include a significant patch without
  proper care. I suggest to prepare it so it is ready
  for the next release, or cherrypick it for a
  20.01.1 release, if having it in stable/2001 is absolute necessity.

- when submitting it, ensure that the commit message
  makes sense, especially having "srv6-mobile:" with no further
  text should be absolutely avoided.

Change-Id: If81441f7ebf11a6ad5638b1327faf18e8ebe6a35
Type: fix
Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>