meta-rauc-raspberrypi: README.rst: Clean up notes about kernel updates

Updating the kernel as part of the rootfs partition will be the default behavior.

Signed-off-by: Atanas Bunchev <atanas.bunchev@konsulko.com>

meta-rauc-raspberrypi/README.rst

@@ -75,14 +75,6 @@ It is also recommended, but not strictly necessary, to enable 'systemd'::
 
    INIT_MANAGER = "systemd"
 
-Optionally, to update the Linux kernel using A/B partitions and a RAUC bundle, put the kernel in the rootfs::
-
-   IMAGE_INSTALL:append = " kernel-image"
-
-Optionally, to boot Linux kernel from the rootfs modify ``boot.cmd.in`` and replace ``fatload mmc 0:1 ${kernel_addr_r} @@KERNEL_IMAGETYPE@@`` with::
-
-   load ${BOOT_DEV} ${kernel_addr_r} boot/@@KERNEL_IMAGETYPE@@
-
 Build the minimal system image::
 
    $ bitbake core-image-minimal