Remove an unused import to silence a compiler warning.
@@ -18,7 +18,7 @@ use isa::TargetIsa;
use legalize_function;
use regalloc;
use result::{CtonError, CtonResult};
-use settings::{FlagsOrIsa, OptLevel};
+use settings::FlagsOrIsa;
use unreachable_code::eliminate_unreachable_code;
use verifier;
use simple_gvn::do_simple_gvn;
