Remove header version check for command "fastboot boot boot.img"

The header version argument is meant for creation of boot images
using boot and flash:raw commands. It is unnecessary to specify the same
while using the boot command with a complete boot image.

Bug: 77920157
Test: fastboot boot boot.img
Change-Id: Ia8fca4180e15906a3ae7c732496a744eb4b15e91
Merged-In: Ia8fca4180e15906a3ae7c732496a744eb4b15e91