it is still impossible. the step #1 there, "install lineageOS" translates to "install a bunch of binaries blobs that include kernel drivers and firmwares that

it is still impossible. the step #1 there, "install lineageOS" translates to "install a bunch of binaries blobs that include kernel drivers and firmwares that were signed by the OEM and google", so no, you are still not free from google code there.