* Remove git-revision from dependency graph
The navigator binary depended on the current git-revision. The issue is
that any target/test depending on the git-revision will have to be
rebuilt/rerun on every commit.
The navigator package itself was careful to avoid unnecessary
rebuilds/reruns. However, the SDK release tarball depends on the
navigator binary and thereby on the git-revision. The daml-assistant
integration tests, which depend on the SDK release tarball, therefore
had to be rerun on every commit.
This change removes the git-revision from the navigator alltogether. For
issue reporting the SDK version is still available.
* Remove unused git-revision and workspace_status
