Remove not needed-anymore exemptions of warnings in CI.
Remove not needed-anymore exemptions of warnings in CI.

Since we run with -Werror, we want the most warnings enabled
we can.

Signed-off-by: Henner Zeller <259ad50fabbfd39355f36ecd6c0afca541ea66ef@acm.org>

chipsalliance/verible,chipsalliance/verible,chipsalliance/verible,chipsalliance/verible,chipsalliance/verible