Integrated: cli: remote git-expand command

[Erik Helin]

Hi all,

please remove this patch that removes the very rarely used `git-expand` CLI command. `git-expand` does not carry its
weight ever since we introduced automatic expanding of pull requests titles (done server-side via the bots).

Testing:
- [x] `make test` on Linux x64
- [x] `make` on Linux x64
- [x] Verified that `git-expand` is no longer present

Thanks,
Erik

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Commit messages:
 - cli: remote git-expand command

Changes: https://git.openjdk.java.net/skara/pull/769/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=769&range=00
  Stats: 160 lines in 2 files changed: 0 ins; 160 del; 0 mod
  Patch: https://git.openjdk.java.net/skara/pull/769.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/769/head:pull/769

PR: https://git.openjdk.java.net/skara/pull/769