Tidy up

src/main/org/apache/tools/ant/taskdefs/Copy.java

@@ -773,7 +773,7 @@ public class Copy extends Task {
                             final FileNameMapper mapper, final Hashtable<String, String[]> map) {
         String[] toCopy = null;
         if (forceOverwrite) {
-            final List<String> v = new ArrayList<String>();
+            final List<String> v = new ArrayList<>();
             for (String name : names) {
                 if (mapper.mapFileName(name) != null) {
                     v.add(name);

src/main/org/apache/tools/ant/types/selectors/OwnedBySelector.java

@@ -25,7 +25,6 @@ import java.nio.file.LinkOption;
 import java.nio.file.attribute.UserPrincipal;
 
 import org.apache.tools.ant.BuildException;
-import org.apache.tools.ant.PropertyHelper;
 
 /**
  * A selector that selects files based on their owner.

src/main/org/apache/tools/ant/types/selectors/PosixGroupSelector.java

@@ -19,7 +19,6 @@
 package org.apache.tools.ant.types.selectors;
 
 import org.apache.tools.ant.BuildException;
-import org.apache.tools.ant.PropertyHelper;
 
 import java.io.File;
 import java.io.IOException;

src/main/org/apache/tools/ant/types/selectors/PosixPermissionsSelector.java

@@ -19,7 +19,6 @@
 package org.apache.tools.ant.types.selectors;
 
 import org.apache.tools.ant.BuildException;
-import org.apache.tools.ant.PropertyHelper;
 import org.apache.tools.ant.util.PermissionUtils;
 
 import java.io.File;