Dockerfile: Update miniconda installer download location & remove unnecessary flag

[Bomme]

https://repo.continuum.io/ was permanently moved to https://repo.anaconda.com
No need to specify -O since we have -o

[mruberry]

@malfet Can you review this, or recommend a more appropriate reviewer?

[dr-ci]

💊 Build failures summary and remediations

As of commit 51ab714 (more details on the Dr. CI page):

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✅ None of the build failures appear to be your fault 💚

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• 1/1 broken upstream at merge base a894fff on Apr 22 from 8:46am to 9:44am PDT (7 commits; 191fa52 - e7a72bb)

  Please rebase on the viable/strict branch (expand for instructions)

  If your commit is newer than viable/strict, you can try basing on an older, stable commit:

  git fetch https://github.com/pytorch/pytorch viable/strict
  git rebase --onto FETCH_HEAD $(git merge-base origin/master HEAD)
  

  If your commit is older than viable/strict:

  git fetch https://github.com/pytorch/pytorch viable/strict
  git rebase FETCH_HEAD
  

  Check out the recency history of this "viable master" tracking branch.

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🚧 1 fixed upstream failure:

These were probably caused by upstream breakages that were already fixed:

• pytorch_xla_linux_bionic_py3_6_clang9_build on Apr 22 from 8:46am to 9:44am PDT (7 commits; 191fa52 - e7a72bb)
  • 🔁 rerun

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This comment has been revised 3 times.

[malfet]

Sorry, I somehow missed that one (I though I've updated all conda URLs in #36233 )

[facebook-github-bot]

@malfet is landing this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

[facebook-github-bot]

@malfet merged this pull request in 8a6ab00.