Python: Remove superfluous reference to FunctionExpr

This way we also get annotations that appear in `Lambda`s

Author: tausbn

python/ql/lib/semmle/python/Exprs.qll

@@ -751,7 +751,7 @@ class Annotation extends Expr {
   Annotation() {
     this = any(AnnAssign a).getAnnotation()
     or
-    exists(Arguments args | args = any(FunctionExpr f).getArgs() |
+    exists(Arguments args |
       this in [
           args.getAnAnnotation(),
           args.getAKwAnnotation(),