pine64-pinetab: Fix README note about U-Boot
@@ -36,11 +36,6 @@ NixOS boot partition.
=== Building U-Boot
-Flashing the boot partition will not affect the installed U-Boot bootloader.
+Mobile NixOS is not managing platform firmware builds anymore.
-U-Boot can be built and then flashed the usual way for Allwinner platforms.
-
-```
- $ nix-build --argstr device pine64-pinetab -A build.u-boot
- $ dd if=result/u-boot-sunxi-with-spl.bin of=/dev/mmcblkX bs=1024 seek=8
-```
+PineTab support in Tow-Boot [is planned](https://github.com/Tow-Boot/Tow-Boot/issues/144).
