Revert "Implement kexec-hardboot by. All work done by @Tasssadar"

This reverts commit 70c71ff4ad1f017295a0248ef58f764f64c1e28b.
revert kexec

Change-Id: I25a9f51081b06ddf21a8af97d0e547c3e02ed401
Signed-off-by: klozz <xxx.reptar.rawrr.xxx@gmail.com>