remove "validation" from list of source folder
diff --git a/bundles/org.eclipse.wst.dtd.core/build.properties b/bundles/org.eclipse.wst.dtd.core/build.properties
index 55ddb7e..5c4cfcc 100644
--- a/bundles/org.eclipse.wst.dtd.core/build.properties
+++ b/bundles/org.eclipse.wst.dtd.core/build.properties
@@ -21,7 +21,6 @@
 source.dtdcore.jar = src/,\
                      contentmodel/,\
                      emfmodel/,\
-                     saxparser/,\
-                     validation/
+                     saxparser/
                       
 output.dtdcore.jar = bin/