remove some dead code

src/dsp/node_mix3.rs

@@ -5,17 +5,6 @@
 use crate::nodes::{NodeAudioContext, NodeExecContext};
 use crate::dsp::{NodeId, SAtom, ProcBuf, DspNode, LedPhaseVals, NodeContext};
 
-//#[macro_export]
-//macro_rules! fa_amp_neg_att { ($formatter: expr, $v: expr, $denorm_v: expr) => { {
-//    let s =
-//        match ($v.round() as usize) {
-//            0  => "Allow",
-//            1  => "Clip",
-//            _  => "?",
-//        };
-//    write!($formatter, "{}", s)
-//} } }
-
 /// A simple amplifier
 #[derive(Debug, Clone)]
 pub struct Mix3 {