HDDS-940. Remove dead store to local variable in OmMetadataManagerImpl. Contributed by Dinesh Chitlangia.

hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OmMetadataManagerImpl.java

@@ -637,7 +637,6 @@ public class OmMetadataManagerImpl implements OMMetadataManager {
   @Override
   public List<BlockGroup> getExpiredOpenKeys() throws IOException {
     List<BlockGroup> keyBlocksList = Lists.newArrayList();
-    long now = Time.now();
     // TODO: Fix the getExpiredOpenKeys, Not part of this patch.
     return keyBlocksList;
   }