[CONFIGURATION-628] Adapted building documentation.

Ant is no longer supported, so the corresponding section could be
removed.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1750983 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/site/xdoc/building.xml b/src/site/xdoc/building.xml
index 5670ec8..30c1a16 100644
--- a/src/site/xdoc/building.xml
+++ b/src/site/xdoc/building.xml
@@ -27,18 +27,10 @@
 
     <body>
 
-        <section name="Overview">
+        <section name="Building">
           <p>
-            Commons Configuration can be built using
-            <a href="http://maven.apache.org">maven</a> or
-            <a href="http://ant.apache.org">ant</a>.
-          </p>
-        </section>
-
-        <section name="Maven">
-          <p>
-            Commons Configuration uses Maven as its build tool. Any recent version
-            of Maven should work. To build the Configuration
+            Commons Configuration uses <a href="http://maven.apache.org">maven</a> as its build tool.
+            Any recent version of Maven should work. To build the Configuration
             jar, change into the directory where the source distribution resides and run
             "mvn install". This will compile the source and tests, run the tests, and then
             package the jar. The jar will also be copied into the local maven repository
@@ -54,7 +46,7 @@
           <p>
             <code>TestWebdavConfigurationBuilder</code> is a functional test that tests
             DefaultConfigurationBuilder with the configuration files stored in a WebDAV
-            server. To run the test the steps that follow
+            server. To run the test, execute the steps that follow
             <ol>
               <li>Copy all the files in the conf directory to the WebDAV server. Not all the
               files are required but it is generally easier to use a tool like cadaver
@@ -78,35 +70,5 @@
             </ol>
           </p>
         </section>
-
-        <section name="Building with Ant">
-          <p>
-            In order to build the project with Apache Ant, some manual preparations
-            have to be done. The problem is that Commons Configuration uses
-            classes generated by <a href="http://javacc.java.net/">JavaCC</a>
-            to process configuration files in specific formats. These classes
-            are produced dynamically during the build process. While Maven is
-            able to download all required artifacts automatically, the Ant build
-            is not that smart. Therefore, it is required to download and install
-            JavaCC manually. Then a file named <code>build.properties</code> has
-            to be created in the root directory of Commons Configuration which
-            defines the <em>javacc_home</em> property; here the path to the
-            JavaCC installation has to be set. Commons Configuration already
-            ships with a <code>build.properties.sample</code> file which can be
-            copied and adapted correspondingly.
-          </p>
-          <p>
-            After these preparations have been done, the following Ant goals
-            can be used:
-            <ul>
-              <li>To build a jar file, change into Configuration's root directory
-              and run "ant jar". The result will be in the "target" subdirectory.
-              </li>
-              <li>To build the Javadocs, run "ant javadoc". The result will be
-              in "target/site/apidocs".</li>
-            </ul>
-          </p>
-        </section>
     </body>
-
 </document>