Avoid warning when passing none as dataset alias

[potiuk]

Passing None is absolutely fine for dataset alias and raising a warning when it happens is not a good idea.

Fixes #51194

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[Dev-iL]

Heh, where did you dig up that issue? 2.11.1 has been quite a while in the making...
Of course I approve - it's exactly how I thought it should be solved 👍

[potiuk]

Heh, where did you dig up that issue?

Had 2.11.1 milestone assigned :)