Remove numbering

Author: Shati Patel

docs/language/ql-handbook/index.rst

@@ -21,7 +21,6 @@ Table of contents
 *****************
 
 .. toctree::
-   :numbered: 3
    :maxdepth: 3
 
    predicates
@@ -42,4 +41,4 @@ Index and search
 ****************
 
 * :ref:`genindex`
-* :ref:`search`
+* :ref:`search`