benchmark: remove redundant +

PR-URL: #17803
Refs: nodejs/code-and-learn#72
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: sreepurnajasti

benchmark/assert/deepequal-object.js

@@ -26,9 +26,9 @@ function createObj(source, add = '') {
 }
 
 function main(conf) {
-  const size = +conf.size;
+  const size = conf.size;
   // TODO: Fix this "hack"
-  const n = (+conf.n) / size;
+  const n = conf.n / size;
   var i;
 
   const source = Array.apply(null, Array(size));