fix build - remove old ant libs

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1880647 13f79535-47bb-0310-9956-ffa450edef68

build.xml

@@ -579,6 +579,9 @@ under the License.
             <fileset dir="${basedir}/lib/util">
                 <include name="asm*7.2.jar"/>
             </fileset>
+            <fileset dir="${basedir}/lib/excelant">
+                <include name="ant*1.10.1.jar"/>
+            </fileset>
         </delete>
 
         <condition property="jars.present">