[clang] [analyzer] Clean up list of taint propagation functions (PR #91635)

[Balazs Benics via cfe-commits]

================
@@ -400,17 +400,14 @@ class GenericTaintChecker : public Checker<check::PreCall, check::PostCall> {
   void taintUnsafeSocketProtocol(const CallEvent &Call,
                                  CheckerContext &C) const;
 
-  /// Default taint rules are initalized with the help of a CheckerContext to
-  /// access the names of built-in functions like memcpy.
+  /// The taint rules are initalized with the help of a CheckerContext to
+  /// access user-provided configuration.
   void initTaintRules(CheckerContext &C) const;
 
-  /// CallDescription currently cannot restrict matches to the global namespace
-  /// only, which is why multiple CallDescriptionMaps are used, as we want to
-  /// disambiguate global C functions from functions inside user-defined
-  /// namespaces.
-  // TODO: Remove separation to simplify matching logic once CallDescriptions
-  // are more expressive.
-
+  // TODO: The two separate `CallDescriptionMap`s were introduced when
+  // `CallDescription` was unable to restric matches to the global namespace
----------------
steakhal wrote:

```suggestion
  // `CallDescription` was unable to restrict matches to the global namespace
```

https://github.com/llvm/llvm-project/pull/91635