fixed

Author: sunxiaojian

core/src/main/java/org/apache/gravitino/storage/relational/service/RoleMetaService.java

@@ -24,8 +24,6 @@
 import com.google.common.collect.Sets;
 import java.io.IOException;
 import java.util.Collections;
-import java.util.Comparator;
-import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;