Drop optional deps

[jhamman]

Checklist

• Used a fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Re-rendered with the latest conda-smithy
• Ensured the license file is being packaged.

closes #5

We may want to wait on merging this until the next minor release of xarray.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[jhamman]

I suggest we time this with xarray's 0.11 release.

[jasongrout]

I suggest we time this with xarray's 0.11 release.

Just curious, for planning purposes, is there a timeframe or estimate for the 0.11 release?

[jhamman]

Hi @jasongrout - we don't have a firm timeline yet. Its next in the queue but a few crucial PRs are moving slowly at the moment. I would expect this to land sometime next month.

[jhamman]

@conda-forge/xarray and @pydata/xarray, any objections to merging this before #40?