Remove an unused Coordinate model

[mokagio]

Stumbled upon this while looking at the files in the context of #24153

It looked odd to have a model wrapping coordinates as it seemed more like something a game or app with heavy UI animations would do.

I tried to remove it and the build was green, so we should be good, right?

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	Build Number	pr24154-5f49514
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📲 You can test the changes from this Pull Request in Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
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	Build Number	pr24154-5f49514
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	Commit	5f49514
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[jkmassel]

I'm pretty certain this was used for geotagging posts.

We haven't had that feature in a long time (as far as I know)

Let's wait until after the next code freeze to merge this though (/cc @kean )