Remove explicit type parameters which can be inferred

Change-Id: I62cd4df252bab6208e1b1cd37f8f8757b0cfc17e
diff --git a/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java b/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java
index 764fe9e..554ef2a 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java
@@ -241,12 +241,12 @@
 
     private static NewConcurrentHashMap<GroupId, Group>
     lazyEmptyExtraneousGroupIdTable() {
-        return NewConcurrentHashMap.<GroupId, Group>ifNeeded();
+        return NewConcurrentHashMap.ifNeeded();
     }
 
     private static NewConcurrentHashMap<GroupId, StoredGroupEntry>
     lazyEmptyGroupIdTable() {
-        return NewConcurrentHashMap.<GroupId, StoredGroupEntry>ifNeeded();
+        return NewConcurrentHashMap.ifNeeded();
     }
 
     /**