unneeded import

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@277367 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -35,7 +35,6 @@ import org.apache.tools.ant.Executor;
 import org.apache.tools.ant.Project;
 import org.apache.tools.ant.ProjectComponent;
 import org.apache.tools.ant.ProjectHelper;
-import org.apache.tools.ant.PropertyHelper;
 import org.apache.tools.ant.Target;
 import org.apache.tools.ant.Task;
 import org.apache.tools.ant.helper.SingleCheckExecutor;