Remove an enum that is not referenced

Change-Id: I64f6b899aa6a6411375473f7ee9c9af068d49ef0
diff --git a/core/net/src/main/java/org/onosproject/net/flow/impl/FlowRuleManager.java b/core/net/src/main/java/org/onosproject/net/flow/impl/FlowRuleManager.java
index d63edac..d38f4fe 100644
--- a/core/net/src/main/java/org/onosproject/net/flow/impl/FlowRuleManager.java
+++ b/core/net/src/main/java/org/onosproject/net/flow/impl/FlowRuleManager.java
@@ -87,8 +87,6 @@
         extends AbstractProviderRegistry<FlowRuleProvider, FlowRuleProviderService>
         implements FlowRuleService, FlowRuleProviderRegistry {
 
-    enum BatchState { STARTED, FINISHED, CANCELLED }
-
     public static final String FLOW_RULE_NULL = "FlowRule cannot be null";
     private static final boolean ALLOW_EXTRANEOUS_RULES = false;