tidy test frameworks required for build
diff --git a/org.eclipse.ajdt.releng/buildAll.xml b/org.eclipse.ajdt.releng/buildAll.xml
index ef817ed..81cb418 100644
--- a/org.eclipse.ajdt.releng/buildAll.xml
+++ b/org.eclipse.ajdt.releng/buildAll.xml
@@ -65,6 +65,7 @@
 	<target name="clean" unless="noclean">
 		<delete dir="${build.home}" />
 		<delete dir="${build.dist}" />
+		<delete dir="${build.dest}/target/eclipse/test_framework"/>
 		<delete dir="${target.eclipse}" />
 	</target>