dont build the bundled version

Index: scribus/third_party/CMakeLists.txt
--- scribus/third_party/CMakeLists.txt.orig
+++ scribus/third_party/CMakeLists.txt
@@ -1,7 +1,3 @@
-#if(WANT_QTADS)
-add_subdirectory(Qt-Advanced-Docking-System)
-#endif()
-
 if(HAVE_OSG)
   add_subdirectory(prc)
 endif ()
