diff --git a/demo-content-library/library/library.xml b/demo-content-library/library/library.xml
index 5b6f661..1310f62 100644
--- a/demo-content-library/library/library.xml
+++ b/demo-content-library/library/library.xml
@@ -6,4 +6,3 @@
   <problem url_name="b7597ae2c50d49e69dd0379465edbdd0"/>
   <problem url_name="5cd09d2566e8409b8ddcb57b0ff2361f"/>
 </library>
-a