remove "validation" from list of source folders
diff --git a/bundles/org.eclipse.wst.dtd.ui/build.properties b/bundles/org.eclipse.wst.dtd.ui/build.properties
index 247e6b0..fd5b05a 100644
--- a/bundles/org.eclipse.wst.dtd.ui/build.properties
+++ b/bundles/org.eclipse.wst.dtd.ui/build.properties
@@ -14,8 +14,7 @@
                *.jar,\
                icons/,\
                plugin.properties
-source.dtdui.jar = src/,\
-                   validation
+source.dtdui.jar = src/
 src.includes = plugin.xml,\
                icons/,\
                build.xml,\