remove unused import

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@277458 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/helper/SingleCheckExecutor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2004 The Apache Software Foundation
+ * Copyright 2004-2005 The Apache Software Foundation
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -18,8 +18,6 @@
 package org.apache.tools.ant.helper;
 
 
-import java.util.Vector;
-
 import org.apache.tools.ant.Project;
 import org.apache.tools.ant.Executor;
 import org.apache.tools.ant.BuildException;