DataType already implements Cloneable

src/main/org/apache/tools/ant/types/AntFilterReader.java

@@ -27,8 +27,7 @@ import org.apache.tools.ant.Project;
  * An AntFilterReader is a wrapper class that encloses the classname
  * and configuration of a Configurable FilterReader.
  */
-public final class AntFilterReader
-    extends DataType implements Cloneable {
+public final class AntFilterReader extends DataType {
 
     private String className;
 

src/main/org/apache/tools/ant/types/FilterChain.java

@@ -45,8 +45,7 @@ import org.apache.tools.ant.filters.TokenFilter;
  * FilterChain may contain a chained set of filter readers.
  *
  */
-public class FilterChain extends DataType
-    implements Cloneable {
+public class FilterChain extends DataType {
 
     private Vector<Object> filterReaders = new Vector<Object>();
 

src/main/org/apache/tools/ant/types/Mapper.java

@@ -30,7 +30,7 @@ import org.apache.tools.ant.util.FileNameMapper;
  * Element to define a FileNameMapper.
  *
  */
-public class Mapper extends DataType implements Cloneable {
+public class Mapper extends DataType {
     // CheckStyle:VisibilityModifier OFF - bc
 
     protected MapperType type = null;

src/main/org/apache/tools/ant/types/XMLCatalog.java

@@ -119,7 +119,7 @@ import org.xml.sax.XMLReader;
  *
  */
 public class XMLCatalog extends DataType
-    implements Cloneable, EntityResolver, URIResolver {
+    implements EntityResolver, URIResolver {
 
     /** helper for some File.toURL connversions */
     private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();