Remove debug print

Author: Yunyung

clients/src/main/java/org/apache/kafka/common/config/AbstractConfig.java

@@ -624,7 +624,6 @@ private Map<String, Plugin<ConfigProvider>> instantiateConfigProviders(
         Map<String, Plugin<ConfigProvider>> configProviderPluginInstances = new HashMap<>();
         for (Map.Entry<String, String> entry : providerMap.entrySet()) {
             try {
-                System.out.println("Checking:" + entry);
                 String prefix = CONFIG_PROVIDERS_CONFIG + "." + entry.getKey() + CONFIG_PROVIDERS_PARAM;
                 Map<String, ?> configProperties = configProviderProperties(prefix, providerConfigProperties);
                 ConfigProvider provider = Utils.newInstance(entry.getValue(), ConfigProvider.class);