Revert "Merge pull request github#17938 from MathiasVP/fix-fp-in-missing-check-scanf-fixing-take-2"

This reverts commit 6785b93, reversing
changes made to d9b86f5.

Author: jketema

cpp/ql/lib/change-notes/released/2.1.1.md

@@ -1,5 +1,3 @@
 ## 2.1.1
 
-### Minor Analysis Improvements
-
-* The `Guards` library (`semmle.code.cpp.controlflow.Guards`) has been improved to recognize more guard conditions. Additionally, the guards library no longer considers guards in static local initializers or global initializers as `GuardCondition`s.
+No user-facing changes.