Revert "Configure SSH for multi-host MPI in dev image (#37614)" (#37634)

This reverts commit 9de9de7.

This broke dev image build.

### Ticket

Revert on main. Dev image build failure.

### Problem description

Broke on main!!

### What's changed

Revert for now

### Checklist

- [ ] [![All post-commit
tests](https://github.com/tenstorrent/tt-metal/actions/workflows/all-post-commit-workflows.yaml/badge.svg?branch=rkim/revert-multihost-docker)](https://github.com/tenstorrent/tt-metal/actions/workflows/all-post-commit-workflows.yaml?query=branch:rkim/revert-multihost-docker)
- [ ] [![Blackhole Post
commit](https://github.com/tenstorrent/tt-metal/actions/workflows/blackhole-post-commit.yaml/badge.svg?branch=rkim/revert-multihost-docker)](https://github.com/tenstorrent/tt-metal/actions/workflows/blackhole-post-commit.yaml?query=branch:rkim/revert-multihost-docker)
- [ ]
[![cpp-unit-tests](https://github.com/tenstorrent/tt-metal/actions/workflows/tt-metal-l2-nightly.yaml/badge.svg?branch=rkim/revert-multihost-docker)](https://github.com/tenstorrent/tt-metal/actions/workflows/tt-metal-l2-nightly.yaml?query=branch:rkim/revert-multihost-docker)
- [ ] New/Existing tests provide coverage for changes


#### Model tests

If your changes cover model-related code, you should run tests
corresponding to affected models and platforms (Single card, T3K,
Galaxy). "Choose your pipeline" workflows facilitate running multiple
kinds of tests in a single run. Each offers `models-mandatory` and
`models-extended` presets.
The former includes a minimal set of tests, to be run always. The latter
extends that with additional ones - use your best judgement in deciding
which is the most appropriate for your PR.

- [ ] [![(Single) Choose your
pipeline](https://github.com/tenstorrent/tt-metal/actions/workflows/pipeline-select.yaml/badge.svg?branch=rkim/revert-multihost-docker)](https://github.com/tenstorrent/tt-metal/actions/workflows/pipeline-select.yaml?query=branch:rkim/revert-multihost-docker)
- [ ] `models-mandatory` preset (runs: [Device perf
regressions](https://github.com/tenstorrent/tt-metal/actions/workflows/perf-device-models.yaml)
and [Frequent model and ttnn
tests](https://github.com/tenstorrent/tt-metal/actions/workflows/fast-dispatch-full-regressions-and-models.yaml))
- [ ] `models-extended` preset (runs: the mandatory tests, plus
[Demo](https://github.com/tenstorrent/tt-metal/actions/workflows/single-card-demo-tests.yaml)
and [Model
perf](https://github.com/tenstorrent/tt-metal/actions/workflows/perf-models.yaml)
tests)
  - [ ] other selection - specify runs

- [ ] [![(T3K) Choose your
pipeline](https://github.com/tenstorrent/tt-metal/actions/workflows/pipeline-select-t3k.yaml/badge.svg?branch=rkim/revert-multihost-docker)](https://github.com/tenstorrent/tt-metal/actions/workflows/pipeline-select-t3k.yaml?query=branch:rkim/revert-multihost-docker)
- [ ] `models-mandatory` preset (runs: [Unit
tests](https://github.com/tenstorrent/tt-metal/actions/workflows/t3000-unit-tests.yaml))
- [ ] `models-extended` preset (runs: the mandatory tests, plus
[Demo](https://github.com/tenstorrent/tt-metal/actions/workflows/t3000-demo-tests.yaml)
and [Model
perf](https://github.com/tenstorrent/tt-metal/actions/workflows/t3000-model-perf-tests.yaml)
tests)
  - [ ] other selection - specify runs

- [ ] [![(Galaxy) Choose your
pipeline](https://github.com/tenstorrent/tt-metal/actions/workflows/pipeline-select-galaxy.yaml/badge.svg?branch=rkim/revert-multihost-docker)](https://github.com/tenstorrent/tt-metal/actions/workflows/pipeline-select-galaxy.yaml?query=branch:rkim/revert-multihost-docker)
- [ ] `models-mandatory` preset (runs: [Quick
tests](https://github.com/tenstorrent/tt-metal/actions/workflows/galaxy-quick.yaml))
- [ ] `models-extended` preset (runs: the mandatory tests, plus
[Demo](https://github.com/tenstorrent/tt-metal/actions/workflows/galaxy-demo-tests.yaml)
and [Model
perf](https://github.com/tenstorrent/tt-metal/actions/workflows/galaxy-perf-tests.yaml)
tests)
  - [ ] other selection - specify runs

Author: tt-rkim

dockerfile/Dockerfile

@@ -200,14 +200,6 @@ RUN if [ "$UBUNTU_VERSION" != "24.04" ]; then \
 COPY /dockerfile/entrypoint.sh /usr/local/bin/entrypoint.sh
 RUN chmod +x /usr/local/bin/entrypoint.sh
 
-# Configure SSH for MPI multihost jobs readiness
-RUN adduser --uid 1000 --shell /bin/bash user
-RUN usermod -aG sudo user
-RUN echo 'user ALL=(ALL) NOPASSWD:ALL' > /etc/sudoers.d/user && chmod 0440 /etc/sudoers.d/user
-
-RUN mkdir -p /run/sshd
-RUN echo "StrictModes no" | sudo tee -a /etc/ssh/sshd_config
-
 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
 
 #############################################################