docs: delete advanced-ql section

Author: james

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

@@ -73,16 +73,15 @@ For more information on using CodeQL to query code written in a specific languag
    javascript/ql-for-javascript
    python/ql-for-python
 
-Advanced QL and technical information
-*************************************
+Technical information
+*********************
 
 For more technical information see:
 
 .. toctree::
    :maxdepth: 2
    :includehidden:
 
-   advanced/advanced-ql
    technical-info    
 
 Reference topics