formula_creator: Remove unused GitHub property

[abitrolly]

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
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• Have you successfully run brew tests with your changes locally?

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Fixes #16675.

[MikeMcQuaid]

Thanks again @abitrolly!

[abitrolly]

@MikeMcQuaid it was not ready yet. :D I think I opened it as a draft PR, or at least intended to do so.

What .null? check does here? I can't find that Ruby has that syntax.

brew/Library/Homebrew/formula_creator.rb

Line 71 in 645cf35

if @version.nil? || @version.null?

[MikeMcQuaid]

@MikeMcQuaid it was not ready yet. :D I think I opened it as a draft PR, or at least intended to do so.

Yup, sorry for overly quick merge.

What .null? check does here? I can't find that Ruby has that syntax.

This is a Version object inside Homebrew itself with a null? method.