PermissionAwareReadOnlyRefDatabase: Remove unneeded @SuppressWarnings

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: I3a2e9136dff6a25f3c39535de4f979bb12adea9a

java/com/google/gerrit/server/git/PermissionAwareReadOnlyRefDatabase.java

diff --git a/java/com/google/gerrit/server/git/PermissionAwareReadOnlyRefDatabase.java b/java/com/google/gerrit/server/git/PermissionAwareReadOnlyRefDatabase.java
index 8c9ebeb..1bd8b45 100644
--- a/java/com/google/gerrit/server/git/PermissionAwareReadOnlyRefDatabase.java
+++ b/java/com/google/gerrit/server/git/PermissionAwareReadOnlyRefDatabase.java
@@ -95,7 +95,6 @@
     return Iterables.getOnlyElement(result);
   }
 
-  @SuppressWarnings("deprecation")
   @Override
   public Map<String, Ref> getRefs(String prefix) throws IOException {
     List<Ref> refs = getDelegate().getRefDatabase().getRefsByPrefix(prefix);