Remove lcms/skcms from libjxl_dec deps. (#449)
Remove lcms/skcms from libjxl_dec deps. (#449)

We only use lcms/skcms on the encoder side for now.
libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl,libjxl/libjxl