util: remove unreachable branch

Re-defining the array length will always set to 0.
Hence, the code branch can not be covered.

PR-URL: nodejs#24447
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Weijia Wang <starkwang@126.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

lib/internal/util/inspect.js

@@ -475,7 +475,7 @@ function noPrototypeIterator(ctx, value, recurseTimes) {
   } else if (Array.isArray(value)) {
     const clazz = Object.getPrototypeOf(value) ||
       clazzWithNullPrototype(Array, 'Array');
-    newVal = new clazz(value.length || 0);
+    newVal = new clazz(value.length);
   } else if (isTypedArray(value)) {
     let clazz = Object.getPrototypeOf(value);
     if (!clazz) {