core/build.xml: Remove

This is no longer necessary (and proably never was).  I assume that this was
added when I was trying to get core to build independently.

core/build.xml

@@ -1,22 +0,0 @@
-<!--
-  TODO: Remove need for depfiles and remove this last requirement on Ant.
-  The only reason this was used originally was because Ant loaded the JVM
-  only once.
--->
-<project name="tame" default="build" basedir=".">
-  <property name="source" value="."/>
-
-  <target name="pkg-dep"
-    description="Output package dependencies in a plain-text format">
-
-    <xslt style="../src/current/pkg-dep.xsl"
-      force="true"
-      basedir="${source}"
-      destdir="${source}"
-      includes="**/*.xml"
-      excludes="rater/"
-      extension=".dep" />
-  </target>
-</project>
-
-