Remove Allman checks from grep lints as DScanner covers these.

[LightBender]

@thewilsonator As requested.

[dlang-bot]

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Testing this PR locally

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[thewilsonator]

These checks are done here in a better manner (i.e. comments are properly considered)

[CyberShadow]

👍 for fewer Makefile hacks.

[thewilsonator]

Hmm, I'm not entirely convinced that the dscanner Allman checks are enabled for that. My dscanner-fu is not up to snuff.