remove obsolete build patches

[chenrui333]

remove obsolete build patches

[p-linnane]

Thanks! Wonder if we can find a way to automate this in the future.

[chenrui333]

Thanks! Wonder if we can find a way to automate this in the future.

yeah, we should, the only false negative is proctools (other than it, it can be just a simple grep and check)

[Bo98]

Seems like some of these are used? e.g. https://github.com/Homebrew/homebrew-core/blob/d6a4adc8498c1b785751b3941636f8442e877f6d/Formula/i/irrlicht.rb#L48-L58

[chenrui333]

Seems like some of these are used? e.g. https://github.com/Homebrew/homebrew-core/blob/d6a4adc8498c1b785751b3941636f8442e877f6d/Formula/i/irrlicht.rb#L48-L58

indeed, also uncover some other being referenced patches (seems like the current script is not quite reliable)