diff --git a/core/src/main/java/org/springframework/security/userdetails/GroupsManager.java b/core/src/main/java/org/springframework/security/userdetails/GroupsManager.java
deleted file mode 100644
index 5429d4f536..0000000000
--- a/core/src/main/java/org/springframework/security/userdetails/GroupsManager.java
+++ /dev/null
@@ -1,32 +0,0 @@
-package org.springframework.security.userdetails;
-
-import org.springframework.security.GrantedAuthority;
-
-import java.util.List;
-
-/**
- * @author Luke Taylor
- * @version $Id$
- */
-public interface GroupsManager {
-
-    List findAllGroups();
-
-    List findUsersInGroup(String groupName);
-
-    void createGroup(String groupName, GrantedAuthority[] authorities);
-
-    void deleteGroup(String groupName);
-
-    void renameGroup(String oldName, String newName);
-
-    void addUserToGroup(String username, String group);
-//
-//    void removeUserFromGroup(String username, String groupName);
-//
-//    GrantedAuthority[] findGroupAuthorities(String groupName);
-//
-//    void removeGroupAuthority(String groupName, GrantedAuthority authority);
-//
-//    void addGroupAuthority(String groupName, GrantedAuthority authority);
-}