Fix build by removing flake8-rst

[datapythonista]

Seems like flake8-rst==0.4.2 is not available in conda anymore. This is making the Travis build fail. Newer versions of flake8-rst are not usable yet, as they validate more things than 0.4.2 and validating our docs would fail the CI too.

We're working on fixing all the flake8-rst linting problems in the docs, and soon we'll be able to upgrade to a newer version. But for now, I think removing flake8-rst from the dependencies, and disabling the docs validation in the CI is the best, so Travis builds pass again.

CC: @jreback @FHaase

[codecov]

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@@            Coverage Diff            @@
##             master   #23975   +/-   ##
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  Coverage          ?   92.31%           
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  Files             ?      161           
  Lines             ?    51473           
  Branches          ?        0           
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  Hits              ?    47517           
  Misses            ?     3956           
  Partials          ?        0

Flag	Coverage Δ
#multiple	90.7% <ø> (?)
#single	42.43% <ø> (?)

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[FHaase]

I think we could upgrade flake8-rst and exclude all files that throw errors.

Then we could reactivate it file by file.

[FHaase]

So if #23847 could be merged I'd rather merge that.

[TomAugspurger]

Why isn't it available anymore? Was it previously coming through the conda-forge channel?

[FHaase]

Yes. It still shows 0.4.2 in the files section.

[TomAugspurger]

This shouldn't be necessary anymore. Anaconda is in the process of switching how conda-forge packages are being mirrored.

Follow https://gitter.im/conda-forge/conda-forge.github.io for updates.

[jreback]

latest build seems ok.

[jreback]

migth have been temporary?

[TomAugspurger]

Yeah. It sounds like the repodata.json and the actual package location got out of sync when they flipped the mirroring. It's been reverted for now.

…

On Wed, Nov 28, 2018 at 4:23 PM Jeff Reback ***@***.***> wrote: migth have been temporary? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#23975 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABQHIo8_k7Kk3aBNTk9GCvZnUpZk0eoZks5uzwzMgaJpZM4Y4MQ6> .

[datapythonista]

I'm still having some problems with travis, it's timing out when creating the environment that has all the linting stuff. But closing this.