Bug 1141282 - Update the zealous Web Audio Editor tests.

toolkit/devtools/server/actors/utils/audionodes.json

@@ -53,7 +53,7 @@
       "threshold": { "param": true },
       "knee": { "param": true },
       "ratio": { "param": true },
-      "reduction": { "param": true },
+      "reduction": {},
       "attack": { "param": true },
       "release": { "param": true }
     }