remove unused member

Change-Id: I8d0660faacc39aa3a0fca50f4813669a0179c408
Reviewed-on: https://asterix-gerrit.ics.uci.edu/653
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Yingyi Bu <buyingyi@gmail.com>
diff --git a/asterix-metadata/src/main/java/org/apache/asterix/metadata/declared/AqlMetadataProvider.java b/asterix-metadata/src/main/java/org/apache/asterix/metadata/declared/AqlMetadataProvider.java
index 48d93f5..9764709 100644
--- a/asterix-metadata/src/main/java/org/apache/asterix/metadata/declared/AqlMetadataProvider.java
+++ b/asterix-metadata/src/main/java/org/apache/asterix/metadata/declared/AqlMetadataProvider.java
@@ -180,7 +180,6 @@
 import org.apache.hyracks.storage.am.rtree.frames.RTreePolicyType;
 
 public class AqlMetadataProvider implements IMetadataProvider<AqlSourceId, String> {
-    public static final String TEMP_DATASETS_STORAGE_FOLDER = "temp";
     private static Logger LOGGER = Logger.getLogger(AqlMetadataProvider.class.getName());
     private MetadataTransactionContext mdTxnCtx;
     private boolean isWriteTransaction;