intelmetool: Enable warning *set-but-unused-variable*

There are no GCC warnings anymore about set but unused variables, and
Clang warns about this switch, as it doesn’t know it.

So remove the switch to use the default set by the switch `Wall`.

Change-Id: Ie9eb26d4f8b298af231b952b547b71d68c649eaf
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: https://review.coreboot.org/19613
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>

0 files changed, 0 insertions, 0 deletions