docs: delete link to query console

docs/language/learn-ql/cobol/introduce-libraries-cobol.rst

@@ -149,4 +149,3 @@ What next?
 ----------
 
 -  Find out more about QL in the `QL language handbook <https://help.semmle.com/QL/ql-handbook/index.html>`__ and `QL language specification <https://help.semmle.com/QL/ql-spec/language.html>`__.
--  Learn more about the query console in `Using the query console <https://lgtm.com/help/lgtm/using-query-console>`__.