Reducant check spotted by kitcambridge.

underscore.js

@@ -636,8 +636,6 @@
     if (a === b) return a !== 0 || 1 / a == 1 / b;
     // A strict comparison is necessary because `null == undefined`.
     if ((a == null) || (b == null)) return a === b;
-    // Either one is undefined
-    if ((a === void 0) || (b === void 0)) return false;
     // Unwrap any wrapped objects.
     if (a._chain) a = a._wrapped;
     if (b._chain) b = b._wrapped;