formatting changes

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@13212 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/tasks/Ant.java

 package hudson.tasks;
 
 import hudson.CopyOnWrite;
+import hudson.EnvVars;
+import hudson.FilePath;
 import hudson.Launcher;
 import hudson.Util;
-import hudson.FilePath;
-import hudson.EnvVars;
 import hudson.model.AbstractBuild;
 import hudson.model.AbstractProject;
 import hudson.model.BuildListener;
@@ -21,13 +21,10 @@ import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.StaplerResponse;
 
 import javax.servlet.ServletException;
-import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.IOException;
 import java.io.Serializable;
-import java.io.StringReader;
 import java.util.Map;
-import java.util.Map.Entry;
 import java.util.Properties;
 
 /**