sstate: Drop 'SafeDep' code from setscene validation function
I have a feeling this code exists from the time before we had proper
coverage of one sstate task by another task. At that time it was a
"poor" persons version of that idea, we now have much better
code internal to bitbake which handles this.
Worse, this code actually breaks certain rebuild scenarios,
e.g.:
bitbake libtool-cross
bitbake libtool-cross -c cleansstate
rm tmp -rf
bitbake libtool-cross
would fail as binutils-cross wasn't installed from sstate.
The easiest fix is to remove the obsolete/broken code.
[YOCTO #5773]
(From OE-Core master rev:
ccad07f35fb7f959e24fd50d04c7d10dd5cf20d0)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
