make bank a normal param

repl/src/prebake.mjs

@@ -4979,8 +4979,4 @@ Pattern.prototype.piano = function () {
       const pan = panwidth(Math.min(midi / maxPan, 1), 0.5);
       return { ...value, pan: (value.pan || 1) * pan };
     });
-};
-
-Pattern.prototype.soundbank = function (name) {
-  return this.fmap((v) => ({ ...v, s: `${name}_${v.s}` }));
-};
+};