Fix 'Redundant specification of type arguments <PathOwners>' warn

Change-Id: Ic4883b00a9d60e03b84d777fb5ad53a4766d9914
diff --git a/owners/src/main/java/com/googlesource/gerrit/owners/OwnersStoredValues.java b/owners/src/main/java/com/googlesource/gerrit/owners/OwnersStoredValues.java
index e456879..c4d27e4 100644
--- a/owners/src/main/java/com/googlesource/gerrit/owners/OwnersStoredValues.java
+++ b/owners/src/main/java/com/googlesource/gerrit/owners/OwnersStoredValues.java
@@ -51,7 +51,7 @@
     }
     log.info("Initializing OwnerStoredValues");
     PATH_OWNERS =
-        new StoredValue<PathOwners>() {
+        new StoredValue<>() {
           @Override
           protected PathOwners createValue(Prolog engine) {
             Map<String, FileDiffOutput> patchList = StoredValues.DIFF_LIST.get(engine);