Drop extra `conda update` calls
Drop extra `conda update` calls

There is no real need for these `conda update` calls any more as the
Conda solver has improved. In fact more often than not, additional
`conda update` calls result in changes that break the environment (e.g.
updating something even if it means breaking the environment by pulling
in older unpinned packages). This happened recently for us with
`tornado`, but it has happened before with other things.

DudLab/docker_nanshe_workflow,nanshe-org/docker_nanshe_workflow,DudLab/docker_nanshe_workflow,nanshe-org/docker_nanshe_workflow