fix(riscv): minimize the changes

Author: elge@alpha15

bare-metal/elastic-metal/reference-content/elastic-metal-rv1-guidelines.mdx

@@ -102,11 +102,9 @@ Linux kernel.
     em-rv1-c4m16s128-a.dts \
     | dtc -o em-rv1-c4m16s128-a.dtb
 
-   # Build the FIT image and check
+   # Build the FIT image
    sudo mv /boot/boot.itb /boot/boot.itb.bak
    sudo mkimage -f em-rv1-c4m16s128-a-boot.its /boot/boot.itb
-   sha256sum ../../linux/arch/riscv/boot/Image
-   sudo mkimage -l /boot/boot.itb
 
    cd ../..
    ```