remove unneeded undefined check

Author: tmacro

lib/api/apiUtils/rateLimit/helpers.js

@@ -144,7 +144,7 @@ function getCachedRateLimitConfig(request) {
 
 function buildRateChecksFromConfig(resourceClass, resourceId, limitConfig) {
     const checks = [];
-    if (limitConfig?.RequestsPerSecond?.Limit !== undefined && limitConfig.RequestsPerSecond?.Limit > 0) {
+    if (limitConfig.RequestsPerSecond?.Limit > 0) {
         checks.push({
             resourceClass,
             resourceId,