De-duplicate and move adjust_nan to InterpCx

src/tools/miri/src/operator.rs

@@ -115,8 +115,4 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
             nan
         }
     }
-
-    fn adjust_nan<F1: Float + FloatConvert<F2>, F2: Float>(&self, f: F2, inputs: &[F1]) -> F2 {
-        if f.is_nan() { self.generate_nan(inputs) } else { f }
-    }
 }