HHH-5693 remove obsolete ant build file

hibernate-entitymanager/build.xml

@@ -1,28 +0,0 @@
-<!-- $Id: build.xml 15105 2008-08-18 19:20:37Z hardy.ferentschik $ -->
-<!--
-  Hibernate Entity Manager ANT build script.
--->
-
-<project name="HibernateEntityManager" basedir=".">
-
-    <target name="generate-metamodel" depends="uptodate.check" unless="metamodel.build.notRequired">
-        <echo>Processing JPA annotations for metamodel generation</echo>
-        <mkdir dir="${target.dir}"/>
-        <javac srcdir="${src.dir}"
-               destdir="${target.dir}"
-               failonerror="false"
-               fork="true"
-               target="1.5"
-               classpath="${classpath}">
-            <compilerarg value="-proc:only"/>
-        </javac>
-        <touch file="${target.dir}/.staleflag"/>
-    </target>
-
-    <target name="uptodate.check">
-        <uptodate property="metamodel.build.notRequired" targetfile="${target.dir}/.staleflag">
-            <srcfiles dir="${src.dir}" includes="**/*.java"/>
-        </uptodate>
-    </target>
-
-</project>