Removed CMYK conversion formulas #24495
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Mugen87
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The RGB and CMYK color spaces have different gamuts. Conversion from RGB to CMYK is device-dependent, and the conversion is a non-trivial operation.
Proper conversion between RGB and CMYK color spaces involves the use of device-specific ICC color profiles.
See, for example, the Conversion Section in this Wikipedia article.
Anyone using CMYK color printing will know how to properly handle their use case.
The formulas removed in this PR convert RGB black to CMYK
NaN, and are not useful.