payment: fix unnecessary cast in EhCacheStateMachineConfigCache

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>

payment/src/main/java/org/killbill/billing/payment/caching/EhCacheStateMachineConfigCache.java

@@ -102,7 +102,7 @@ public StateMachineConfig getPaymentStateMachineConfig(final String pluginName,
         final String pluginConfigKey = getCacheKeyName(pluginName, tenantContext);
         final CacheLoaderArgument cacheLoaderArgument = createCacheLoaderArgument(pluginName);
         try {
-            StateMachineConfig pluginPaymentStateMachineConfig = (StateMachineConfig) cacheController.get(pluginConfigKey, cacheLoaderArgument);
+            StateMachineConfig pluginPaymentStateMachineConfig = cacheController.get(pluginConfigKey, cacheLoaderArgument);
             // It means we are using the default state machine config in a multi-tenant deployment
             if (pluginPaymentStateMachineConfig == null) {
                 pluginPaymentStateMachineConfig = defaultPaymentStateMachineConfig;