Buildroot change Iaee8834b4262ceec2de7521fc2720f62b6295e23
(security-overlay: auto look for rootfs partition and init file)
it can look for these info by itself. So remove them.
Signed-off-by: Zain Wang <wzz@rock-chips.com>
Change-Id: I06ce237757635c79e32483f2f3424914814e0357