diff --git a/Chapter04/parameters.rs b/Chapter04/parameters.rs
index 5418fb2..7ece10c 100644
--- a/Chapter04/parameters.rs
+++ b/Chapter04/parameters.rs
@@ -56,7 +56,4 @@ fn main()
 
    <Baz as Foo>::f(&b);
    <Baz as Bar>::f(&b);
-
-   f::<Foo>(&b);
-   f::<Bar>(&b);
 }