docs: small change to codeql training landing page

Author: james

docs/language/learn-ql/ql-training.rst

@@ -57,9 +57,8 @@ CodeQL and variant analysis for Java
 - `Exercise: Apache Struts <../ql-training/java/apache-struts-java.html>`__–an example demonstrating how to develop a data flow query.
 - `Introduction to global data flow <../ql-training/java/global-data-flow-java.html>`__–an introduction to analyzing global data flow in Java using CodeQL.
 
-More resources
-~~~~~~~~~~~~~~
+Further reading
+~~~~~~~~~~~~~~~
 
 - If you are completely new to CodeQL, look at our introductory topics in :doc:`Learning CodeQL <index>`.
-- To find more detailed information about how to write queries for specific languages, visit the links in :ref:`Writing CodeQL queries <writing-ql-queries>`.
 - To see examples of CodeQL queries that have been used to find security vulnerabilities and bugs in open source software projects, visit the `GitHub Security Lab website <https://securitylab.github.com/research>`__ and the associated `repository <https://github.com/github/security-lab>`__.