[cleanup] Get rid of @noextend on final class

rse/plugins/org.eclipse.dstore.core/src/org/eclipse/dstore/core/model/DataElement.java

@@ -33,7 +33,6 @@ import org.eclipse.dstore.internal.extra.PropertySource;
  * <code>DataElement</code>s should not be constructed directly, rather they are requested via the createObject()
  * method in <code>DataStore</code>
  *
- * @noextend This class is not intended to be subclassed by clients.
  * @noinstantiate This class is not intended to be instantiated by clients.  DataElements
  * should be created via the DataStore create methods.
  */

rse/plugins/org.eclipse.dstore.core/src/org/eclipse/dstore/core/model/DataStore.java

@@ -79,7 +79,6 @@ import org.eclipse.dstore.internal.core.util.XMLparser;
  * <code>DataStore</code>, either directly via a <code>IDomainNotifier</code> or indirectly over the communication
  * layer through a client <code>DataStore</code>.
  * </p>
- * @noextend This class is not intended to be subclassed by clients.
  * @noinstantiate This class is not intended to be instantiated by clients.
  */
 public final class DataStore

rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/core/model/SystemSignonInformation.java

@@ -27,7 +27,6 @@ import org.eclipse.rse.core.subsystems.ICredentials;
  * must be secure and never disclose the password for the remote system in its unencrypted form.
  * However the encrypted form of the password is not considered secret information and can be
  * accessed by anyone.
- * @noextend This class is not intended to be subclassed by clients.
  */
 public final class SystemSignonInformation implements ICredentials {
 

rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/core/subsystems/ServerLaunchType.java

@@ -23,7 +23,6 @@ import java.util.List;
 /**
  * Server Launch Type Enum type.
  * 
- * @noextend This class is not intended to be subclassed by clients.
  * @noinstantiate This class is not intended to be instantiated by clients. Use
  *                the {@link #get(int)} or {@link #get(String)} factory methods
  *                instead.