Stayd authored Nov 25, 2023 and Jacob Boerema committed Dec 01, 2023

Per the official format specification and hardware implementation,
BC1 cutout pixels are always black with 0 alpha, whereas previous
versions of the plugin interpreted them as white. Commit f97e718e
partially fixed this, but made the behavior an import option that
also ignored the alpha component. This commit reverts the addition
of this option in favor of consistently following the spec.