minor: remove unused import

SVN: 10332

datastore_server/source/java/ch/systemsx/cisd/openbis/dss/generic/server/DataStoreService.java

@@ -28,7 +28,6 @@ import ch.systemsx.cisd.cifex.rpc.client.RPCServiceFactory;
 import ch.systemsx.cisd.cifex.shared.basic.Constants;
 import ch.systemsx.cisd.common.exceptions.InvalidAuthenticationException;
 import ch.systemsx.cisd.common.exceptions.InvalidSessionException;
-import ch.systemsx.cisd.common.exceptions.UserFailureException;
 import ch.systemsx.cisd.common.exceptions.WrappedIOException;
 import ch.systemsx.cisd.common.spring.AbstractServiceWithLogger;
 import ch.systemsx.cisd.openbis.generic.shared.IDataStoreService;