binutils: Drop unneeded and problematic vardeps explict value and immediate expansion

binutils: Drop unneeded and problematic vardeps explict value and immediate expansion

This was introduced in 0788cf349fe37ef4a36c626dbc396c97d1ab14d7 as a way of
tracking the EXTRA_OECONF changes. These should be tracked reliably by the
contains() code now so it is assumed this was working around a bug at the time.
I checked the current task hashes and that information is there.

Therefore drop this bit of code as the immediate expansion causes inaccurate
values.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>